This chapter discusses input and output devices used with computers. It describes keyboards, pointing devices like mice and touchscreens, as well as scanners, readers, digital cameras, and audio input devices. Display devices and their technologies like LCDs and OLEDs are covered. Printers and audio output are also mentioned. The chapter provides details on the purpose and common types of various input and output hardware used with computers.
Understanding Computers: Today and Tomorrow, 13th Edition Chapter 8 - The Int...yaminohime
This chapter covers:
The evolution of the Internet
The Internet community
Different options for connecting to the Internet
Internet searching
Common Internet applications available via the Internet
Societal issues that apply to Internet use
Understanding Computers: Today and Tomorrow, 13th Edition Chapter 2 - The Sys...yaminohime
Objectives
- Understand how data and programs are represented to a computer and be able to identify a few of the coding systems used to accomplish this.
- Explain the functions of the hardware components commonly found inside the system unit, such as the CPU, memory, buses, and expansion cards.
- Describe how new peripheral devices or other hardware can be added to a computer.
- Understand how the computer system’s CPU and memory components process program instructions and data.
- Name and evaluate several strategies that can be used today for speeding up the operations of a computer.
- List some technologies that may be used in the future computers.
This chapter covers:
- Different types of keyboards and pointing devices
- Types of scanners, readers, and digital cameras
- Audio input devices
- Types of display devices and how they work
- Types of printers and how they work
- Audio output
This chapter introduces computers and their role in society. It discusses how computers have become integrated into our personal and professional lives for tasks like communication, education, entertainment and business. The chapter then describes what a computer is and its basic components - input, processing, output, storage and communication. It provides an overview of the evolution of computers from the earliest mechanical devices to modern electronic computers. It also defines the different types of computers and discusses computer networks and the Internet. Finally, it examines the societal impacts of the growing prominence of computers.
The chapter discusses how computers represent and process data. It explains that computers use binary numbering to represent all data as strings of 0s and 1s. It describes the main hardware components inside a computer system unit, including the central processing unit (CPU), memory, motherboard, buses, drive bays, and power supply. The CPU, consisting of one or more processor cores, performs processing and accesses memory and cache to execute instructions. Factors like clock speed, cache size, and bus bandwidth impact processing speed.
Understanding Computers: Today and Tomorrow, 13th Edition Chapter 5 - System ...yaminohime
Objectives
- Understand the difference between system software and application software.
- Explain the different functions of an operating system and discuss some ways that operating systems can enhance processing efficiency.
- List several ways in which operating systems differ from one another.
- Name today’s most widely used operating systems for personal computers and servers.
-State several devices other than personal computers and servers that require an operating system and list one possible operating system for each type of device.
- Discuss the role of utility programs and outline several tasks these programs perform.
- Describe what the operating systems of the future might be like.
Objectives
- Name several general properties of storage systems.
- Describe the two most common types of hard drives and what they are used for today.
- Discuss the various types of optical discs available and how they differ from each other.
- Identify some flash-memory-based storage devices and media and explain how they are used today.
- List at least three other types of storage systems.
- Summarize the storage alternatives for a typical personal computer.
Objectives
- Describe what application software is, the different types of ownership rights, and the difference between installed and Web-based software.
- Detail some concepts and commands that many software programs have in common.
- Discuss word processing and explain what kinds of documents are created using this type of program.
- Explain the purpose of spreadsheet software and the kinds of documents created using this type of program.
- Identify some of the vocabulary used with database software and discuss the benefits of using this type of program.
- Describe what presentation graphics and electronic slide shows are and when they might be used.
- List some types of graphics and multimedia software consumers frequently use.
- Name other types of application software programs and discuss what functions they perform.
Understanding Computers: Today and Tomorrow, 13th Edition Chapter 8 - The Int...yaminohime
This chapter covers:
The evolution of the Internet
The Internet community
Different options for connecting to the Internet
Internet searching
Common Internet applications available via the Internet
Societal issues that apply to Internet use
Understanding Computers: Today and Tomorrow, 13th Edition Chapter 2 - The Sys...yaminohime
Objectives
- Understand how data and programs are represented to a computer and be able to identify a few of the coding systems used to accomplish this.
- Explain the functions of the hardware components commonly found inside the system unit, such as the CPU, memory, buses, and expansion cards.
- Describe how new peripheral devices or other hardware can be added to a computer.
- Understand how the computer system’s CPU and memory components process program instructions and data.
- Name and evaluate several strategies that can be used today for speeding up the operations of a computer.
- List some technologies that may be used in the future computers.
This chapter covers:
- Different types of keyboards and pointing devices
- Types of scanners, readers, and digital cameras
- Audio input devices
- Types of display devices and how they work
- Types of printers and how they work
- Audio output
This chapter introduces computers and their role in society. It discusses how computers have become integrated into our personal and professional lives for tasks like communication, education, entertainment and business. The chapter then describes what a computer is and its basic components - input, processing, output, storage and communication. It provides an overview of the evolution of computers from the earliest mechanical devices to modern electronic computers. It also defines the different types of computers and discusses computer networks and the Internet. Finally, it examines the societal impacts of the growing prominence of computers.
The chapter discusses how computers represent and process data. It explains that computers use binary numbering to represent all data as strings of 0s and 1s. It describes the main hardware components inside a computer system unit, including the central processing unit (CPU), memory, motherboard, buses, drive bays, and power supply. The CPU, consisting of one or more processor cores, performs processing and accesses memory and cache to execute instructions. Factors like clock speed, cache size, and bus bandwidth impact processing speed.
Understanding Computers: Today and Tomorrow, 13th Edition Chapter 5 - System ...yaminohime
Objectives
- Understand the difference between system software and application software.
- Explain the different functions of an operating system and discuss some ways that operating systems can enhance processing efficiency.
- List several ways in which operating systems differ from one another.
- Name today’s most widely used operating systems for personal computers and servers.
-State several devices other than personal computers and servers that require an operating system and list one possible operating system for each type of device.
- Discuss the role of utility programs and outline several tasks these programs perform.
- Describe what the operating systems of the future might be like.
Objectives
- Name several general properties of storage systems.
- Describe the two most common types of hard drives and what they are used for today.
- Discuss the various types of optical discs available and how they differ from each other.
- Identify some flash-memory-based storage devices and media and explain how they are used today.
- List at least three other types of storage systems.
- Summarize the storage alternatives for a typical personal computer.
Objectives
- Describe what application software is, the different types of ownership rights, and the difference between installed and Web-based software.
- Detail some concepts and commands that many software programs have in common.
- Discuss word processing and explain what kinds of documents are created using this type of program.
- Explain the purpose of spreadsheet software and the kinds of documents created using this type of program.
- Identify some of the vocabulary used with database software and discuss the benefits of using this type of program.
- Describe what presentation graphics and electronic slide shows are and when they might be used.
- List some types of graphics and multimedia software consumers frequently use.
- Name other types of application software programs and discuss what functions they perform.
This chapter covers:
- Common networking and communications applications
- Networking concepts and terminology
- Technical issues related to networks, including general characteristics of data transmission, and types of transmission media in use today
- Explanation of the various communications protocols and networking standards
- Various types of hardware used with a computer network
overview:-
This chapter covers:
What computers are, how they work, and how they are used
Computer terminology
An overview of the history of computers
The basic types of computers in use today
How to access resources on the Internet
Societal impacts of computers
Why learn about computers?
Pervasive computing
Also known as ubiquitous computing
Computers have become an integral part of our lives
Basic computer literacy
Understanding what a computer is and how it works
Computer storage refers to components and media that retain digital data. There are three main categories of computer storage: primary, secondary, and tertiary (offline). Primary storage includes processor registers, cache, RAM, and ROM. Secondary storage includes hard disks, CDs/DVDs, tapes, and other removable media. Tertiary storage uses robotic mechanisms to access removable media. [/SUMMARY]
A computer is an electronic machine that can store, retrieve, and process data according to a set of instructions. It converts raw data into meaningful information. Data refers to unprocessed facts while information is processed data that has meaning. A computer system consists of hardware, software, and liveware that work together. The hardware are the physical parts like the system unit, monitor, keyboard, and mouse. Software includes the programs and applications that make the computer work. Liveware are the computer users. The main components of hardware are the processor, memory, input/output devices, storage, and communication devices. The processor executes instructions and contains the arithmetic logic unit and control unit. Memory temporarily stores data and programs in RAM and permanently stores firmware
The first generation of computers used vacuum tubes as their basic electronic components which made the computers very large and prone to overheating issues. They had limited memory using punched cards and could only perform basic mathematical calculations. Programming was done in low-level machine languages. Some examples of first generation computers include ENIAC, EDVAC, and UNIVAC.
This document discusses various computer hardware components and how they affect system performance, including memory configuration and channel types, hard disk RPM and density, CPU clock speeds and brands, motherboard and power supply quality, and graphics cards. It provides examples of high-end 2009 components like the Intel Core i7 975 Extreme CPU costing $999 and NVIDIA GTX 295 graphics card offering over 50 times more processing power for similar prices. In summary, the document examines how different hardware specifications influence a computer's overall speed and processing capabilities.
This document provides an overview of computer basics, including:
- Hardware refers to the physical components of a computer like the case, monitor, keyboard. Software refers to programs and instructions that make the hardware work.
- The CPU (central processing unit) is the brain of the computer and contains the arithmetic/logic and control units. RAM (random access memory) is short-term memory the computer uses to run programs.
- The basic process of how a computer works involves inputting data, the CPU processing it using programs stored in memory, and producing an output. Proper care and ergonomics are important for health and safety.
This document discusses the five generations of computers from 1940 to present. The first generation used vacuum tubes and were very large, expensive, and unreliable. The second generation used transistors, which made computers smaller, cheaper, and more reliable. The third generation used integrated circuits, making computers even smaller and faster. The fourth generation used microprocessors and VLSI circuits, leading to the development of personal computers. The fifth generation, the present time, uses ULSI technology and artificial intelligence for parallel processing and true artificial intelligence.
The document summarizes the key characteristics of the five generations of computers from 1946 to the present. First generation computers used vacuum tubes and were slow, large, and unreliable. Second generation computers replaced vacuum tubes with transistors, making them smaller, faster, and more energy efficient. Third generation computers used integrated circuits instead of transistors, reducing size and cost further. Fourth generation computers utilized microprocessors and VLSI chips, becoming cheaper, faster, and suitable for personal use. Fifth generation computers are anticipated to utilize technologies like quantum computing and artificial intelligence.
The document summarizes the four generations of computers from 1945 to present day. The first generation used vacuum tubes and were large and unreliable. The second generation used transistors, which were smaller and more durable. The third generation used integrated circuits, making computers even smaller and cheaper. The fourth generation used VLSI technology, allowing millions of transistors to fit on a single chip and making computers widely affordable for homes and schools. Today's computers are classified as fourth generation and have tremendous processing power and data storage capacity.
The document summarizes the history of computers from early counting devices like tally sticks and abacuses through the five generations of modern computers. It describes the first generation which used vacuum tubes, the second which used transistors, the third using integrated circuits, the fourth using microprocessors, and the goal of the fifth generation to use artificial intelligence. Key inventions included Charles Babbage's analytical engine, the first computer program written by Ada Lovelace, and the use of binary by Babbage on the analytical engine.
hi there,,,,,,!!!
I am ajit yadav please see my ms powerpoint presentation 2007 & comment my ppt 'Microsoft Office 2007 (codenamed Office 12)[4] is a version of Microsoft Office, a family of office suites and productivity software for Windows, developed and published by Microsoft. It was released to volume license customers on November 30, 2006[5] and to retail customers on January 30, 2007, the same respective release dates of Windows Vista. It was preceded by Office 2003 and succeeded by Office 2010.
Office 2007 introduced a new graphical user interface called the Fluent User Interface, which uses ribbons and an office start menu instead of menu bars and toolbars.[6] Office 2007 requires at Windows XP with Service Pack 2, Windows Server 2003 with Service Pack 1, or a later OS.[2] Office 2007 is the last version of Microsoft Office to support Windows XP Professional x64 Edition.
Office 2007 includes new applications and server-side tools, including Microsoft Groove, a collaboration and communication suite for smaller businesses, which was originally developed by Groove Networks before being acquired by Microsoft in 2005. Also included is Office SharePoint Server 2007, a major revision to the server platform for Office applications, which supports Excel Services, a client-server architecture for supporting Excel workbooks that are shared in real time between multiple machines, and are also viewable and editable through a web page.
With Microsoft FrontPage discontinued, Microsoft SharePoint Designer, which is aimed towards development of SharePoint portals, becomes part of the Office 2007 family. Its designer-oriented counterpart, Microsoft Expression Web, is targeted for general web development. However, neither application has been included in Office 2007 software suites.123
This document discusses operating systems and utility programs. It defines operating systems as programs that coordinate computer hardware resources and provide functions like booting a computer, managing memory and devices. It describes three types of operating systems - stand-alone, network, and embedded - and the different interfaces they use like command line, menu-driven and graphical user interfaces. Utility programs are defined as system software that perform maintenance tasks like file management, diagnostics, file compression, antivirus protection, and disk optimization. The document provides examples of commonly used operating systems and utility programs.
This document provides an introduction to computers and their components. It discusses the history of computers from the abacus to modern devices. It describes the basic characteristics and functions of computers, including input, processing, output, and storage. Various hardware components are outlined, such as processors, memory, storage devices, and input/output mechanisms. The document also covers operating systems, software, and different types of computers based on size, technology, and purpose. In summary, it serves as a comprehensive overview of computers, their evolution, and the core parts that make them functional machines.
The motherboard is the central circuit board in a computer that connects the various components like the CPU, memory, storage, and peripherals. It provides the electrical pathways allowing these components to communicate with each other. Over time, more functions have been integrated onto motherboards, from basic components in early computers to modern boards that support complex graphics, audio, and networking. The motherboard contains the BIOS, chipset that directs data flow, and expansion slots to connect additional components. Common motherboard failures include catastrophic failures during early use, intermittent component failures, and difficult to diagnose issues causing crashes or reboots.
The document discusses the key components of computer hardware. It describes the motherboard as holding crucial components like the CPU, memory, and I/O connectors. The CPU carries out computer programs' instructions and performs basic arithmetic, logical, and I/O operations. RAM is a type of volatile memory that is used as the computer's main memory and loses data when powered off. The hard drive uses magnetic disks to store and retrieve digital data through rapid disk rotation. Other common hardware includes keyboards, mice, printers, speakers, USB ports, and ROM.
Introduction to Computer Science by GoLearningBusKalpit Jain
Introduction to Computer Science by GoLearningBus (A quality product for education)
In this bite sized module we will explore:
What is Computer Science?
What is Computer System?
What is Computation?
Types of Computing
Computer Organization
Hardware and Software
Operating Systems
For audio access please visit app.wagmob.com and go into GoLearningBus
This document introduces computers and their basic components. It defines a computer as an electronic device that processes data. The four main parts of a computer system are hardware, software, data, and people. Hardware refers to the physical parts of the computer, software contains the computer's instructions, data is the raw facts manipulated by the computer, and people are the users. The document outlines the four types of computer hardware, two categories of software and their purposes, and four common types of computers and the jobs they perform best.
This document provides an overview of application software. It begins by describing different types of application software ownership rights such as commercial software, shareware, freeware, and open source software. It also discusses the difference between installed and web-based software. The document then examines common software commands and concepts that are found across many programs. It provides details about specific types of application software including word processing, spreadsheets, databases, presentation graphics, and other software. It discusses the purpose and features of each type of application.
The document summarizes various types of storage systems used with personal computers. It describes the characteristics of hard drives, including magnetic and solid state drives, and how they are used as primary storage. It also discusses optical discs like CDs, DVDs, and Blu-rays, as well as different flash memory storage devices. The document briefly mentions other storage systems including network storage, smart cards, and holographic storage. It evaluates the typical storage alternatives for a personal computer.
This chapter covers:
- Common networking and communications applications
- Networking concepts and terminology
- Technical issues related to networks, including general characteristics of data transmission, and types of transmission media in use today
- Explanation of the various communications protocols and networking standards
- Various types of hardware used with a computer network
overview:-
This chapter covers:
What computers are, how they work, and how they are used
Computer terminology
An overview of the history of computers
The basic types of computers in use today
How to access resources on the Internet
Societal impacts of computers
Why learn about computers?
Pervasive computing
Also known as ubiquitous computing
Computers have become an integral part of our lives
Basic computer literacy
Understanding what a computer is and how it works
Computer storage refers to components and media that retain digital data. There are three main categories of computer storage: primary, secondary, and tertiary (offline). Primary storage includes processor registers, cache, RAM, and ROM. Secondary storage includes hard disks, CDs/DVDs, tapes, and other removable media. Tertiary storage uses robotic mechanisms to access removable media. [/SUMMARY]
A computer is an electronic machine that can store, retrieve, and process data according to a set of instructions. It converts raw data into meaningful information. Data refers to unprocessed facts while information is processed data that has meaning. A computer system consists of hardware, software, and liveware that work together. The hardware are the physical parts like the system unit, monitor, keyboard, and mouse. Software includes the programs and applications that make the computer work. Liveware are the computer users. The main components of hardware are the processor, memory, input/output devices, storage, and communication devices. The processor executes instructions and contains the arithmetic logic unit and control unit. Memory temporarily stores data and programs in RAM and permanently stores firmware
The first generation of computers used vacuum tubes as their basic electronic components which made the computers very large and prone to overheating issues. They had limited memory using punched cards and could only perform basic mathematical calculations. Programming was done in low-level machine languages. Some examples of first generation computers include ENIAC, EDVAC, and UNIVAC.
This document discusses various computer hardware components and how they affect system performance, including memory configuration and channel types, hard disk RPM and density, CPU clock speeds and brands, motherboard and power supply quality, and graphics cards. It provides examples of high-end 2009 components like the Intel Core i7 975 Extreme CPU costing $999 and NVIDIA GTX 295 graphics card offering over 50 times more processing power for similar prices. In summary, the document examines how different hardware specifications influence a computer's overall speed and processing capabilities.
This document provides an overview of computer basics, including:
- Hardware refers to the physical components of a computer like the case, monitor, keyboard. Software refers to programs and instructions that make the hardware work.
- The CPU (central processing unit) is the brain of the computer and contains the arithmetic/logic and control units. RAM (random access memory) is short-term memory the computer uses to run programs.
- The basic process of how a computer works involves inputting data, the CPU processing it using programs stored in memory, and producing an output. Proper care and ergonomics are important for health and safety.
This document discusses the five generations of computers from 1940 to present. The first generation used vacuum tubes and were very large, expensive, and unreliable. The second generation used transistors, which made computers smaller, cheaper, and more reliable. The third generation used integrated circuits, making computers even smaller and faster. The fourth generation used microprocessors and VLSI circuits, leading to the development of personal computers. The fifth generation, the present time, uses ULSI technology and artificial intelligence for parallel processing and true artificial intelligence.
The document summarizes the key characteristics of the five generations of computers from 1946 to the present. First generation computers used vacuum tubes and were slow, large, and unreliable. Second generation computers replaced vacuum tubes with transistors, making them smaller, faster, and more energy efficient. Third generation computers used integrated circuits instead of transistors, reducing size and cost further. Fourth generation computers utilized microprocessors and VLSI chips, becoming cheaper, faster, and suitable for personal use. Fifth generation computers are anticipated to utilize technologies like quantum computing and artificial intelligence.
The document summarizes the four generations of computers from 1945 to present day. The first generation used vacuum tubes and were large and unreliable. The second generation used transistors, which were smaller and more durable. The third generation used integrated circuits, making computers even smaller and cheaper. The fourth generation used VLSI technology, allowing millions of transistors to fit on a single chip and making computers widely affordable for homes and schools. Today's computers are classified as fourth generation and have tremendous processing power and data storage capacity.
The document summarizes the history of computers from early counting devices like tally sticks and abacuses through the five generations of modern computers. It describes the first generation which used vacuum tubes, the second which used transistors, the third using integrated circuits, the fourth using microprocessors, and the goal of the fifth generation to use artificial intelligence. Key inventions included Charles Babbage's analytical engine, the first computer program written by Ada Lovelace, and the use of binary by Babbage on the analytical engine.
hi there,,,,,,!!!
I am ajit yadav please see my ms powerpoint presentation 2007 & comment my ppt 'Microsoft Office 2007 (codenamed Office 12)[4] is a version of Microsoft Office, a family of office suites and productivity software for Windows, developed and published by Microsoft. It was released to volume license customers on November 30, 2006[5] and to retail customers on January 30, 2007, the same respective release dates of Windows Vista. It was preceded by Office 2003 and succeeded by Office 2010.
Office 2007 introduced a new graphical user interface called the Fluent User Interface, which uses ribbons and an office start menu instead of menu bars and toolbars.[6] Office 2007 requires at Windows XP with Service Pack 2, Windows Server 2003 with Service Pack 1, or a later OS.[2] Office 2007 is the last version of Microsoft Office to support Windows XP Professional x64 Edition.
Office 2007 includes new applications and server-side tools, including Microsoft Groove, a collaboration and communication suite for smaller businesses, which was originally developed by Groove Networks before being acquired by Microsoft in 2005. Also included is Office SharePoint Server 2007, a major revision to the server platform for Office applications, which supports Excel Services, a client-server architecture for supporting Excel workbooks that are shared in real time between multiple machines, and are also viewable and editable through a web page.
With Microsoft FrontPage discontinued, Microsoft SharePoint Designer, which is aimed towards development of SharePoint portals, becomes part of the Office 2007 family. Its designer-oriented counterpart, Microsoft Expression Web, is targeted for general web development. However, neither application has been included in Office 2007 software suites.123
This document discusses operating systems and utility programs. It defines operating systems as programs that coordinate computer hardware resources and provide functions like booting a computer, managing memory and devices. It describes three types of operating systems - stand-alone, network, and embedded - and the different interfaces they use like command line, menu-driven and graphical user interfaces. Utility programs are defined as system software that perform maintenance tasks like file management, diagnostics, file compression, antivirus protection, and disk optimization. The document provides examples of commonly used operating systems and utility programs.
This document provides an introduction to computers and their components. It discusses the history of computers from the abacus to modern devices. It describes the basic characteristics and functions of computers, including input, processing, output, and storage. Various hardware components are outlined, such as processors, memory, storage devices, and input/output mechanisms. The document also covers operating systems, software, and different types of computers based on size, technology, and purpose. In summary, it serves as a comprehensive overview of computers, their evolution, and the core parts that make them functional machines.
The motherboard is the central circuit board in a computer that connects the various components like the CPU, memory, storage, and peripherals. It provides the electrical pathways allowing these components to communicate with each other. Over time, more functions have been integrated onto motherboards, from basic components in early computers to modern boards that support complex graphics, audio, and networking. The motherboard contains the BIOS, chipset that directs data flow, and expansion slots to connect additional components. Common motherboard failures include catastrophic failures during early use, intermittent component failures, and difficult to diagnose issues causing crashes or reboots.
The document discusses the key components of computer hardware. It describes the motherboard as holding crucial components like the CPU, memory, and I/O connectors. The CPU carries out computer programs' instructions and performs basic arithmetic, logical, and I/O operations. RAM is a type of volatile memory that is used as the computer's main memory and loses data when powered off. The hard drive uses magnetic disks to store and retrieve digital data through rapid disk rotation. Other common hardware includes keyboards, mice, printers, speakers, USB ports, and ROM.
Introduction to Computer Science by GoLearningBusKalpit Jain
Introduction to Computer Science by GoLearningBus (A quality product for education)
In this bite sized module we will explore:
What is Computer Science?
What is Computer System?
What is Computation?
Types of Computing
Computer Organization
Hardware and Software
Operating Systems
For audio access please visit app.wagmob.com and go into GoLearningBus
This document introduces computers and their basic components. It defines a computer as an electronic device that processes data. The four main parts of a computer system are hardware, software, data, and people. Hardware refers to the physical parts of the computer, software contains the computer's instructions, data is the raw facts manipulated by the computer, and people are the users. The document outlines the four types of computer hardware, two categories of software and their purposes, and four common types of computers and the jobs they perform best.
This document provides an overview of application software. It begins by describing different types of application software ownership rights such as commercial software, shareware, freeware, and open source software. It also discusses the difference between installed and web-based software. The document then examines common software commands and concepts that are found across many programs. It provides details about specific types of application software including word processing, spreadsheets, databases, presentation graphics, and other software. It discusses the purpose and features of each type of application.
The document summarizes various types of storage systems used with personal computers. It describes the characteristics of hard drives, including magnetic and solid state drives, and how they are used as primary storage. It also discusses optical discs like CDs, DVDs, and Blu-rays, as well as different flash memory storage devices. The document briefly mentions other storage systems including network storage, smart cards, and holographic storage. It evaluates the typical storage alternatives for a personal computer.
This document provides an overview of key topics related to computer networks that will be covered in Chapter 7, including defining what a computer network is, common networking applications such as the internet and cellular networks, characteristics of networks such as wired vs wireless and different topologies, how data is transmitted over networks, examples of networking media like twisted pair cable and wireless frequencies, common communication protocols and standards, and networking hardware devices. The chapter will cover networking concepts, technical issues, protocols, and hardware in detail.
This chapter introduces computers and their role in modern society. It discusses how computers have become integrated into business and personal lives. The chapter defines what a computer is and describes its basic operations of input, processing, output, storage, and communication. It provides an overview of the history and evolution of computers and identifies the six basic types: embedded systems, mobile devices, personal computers, servers, mainframes, and supercomputers. The chapter also discusses computer hardware, software, and how networks and the internet function at a high level.
The document discusses system software, including operating systems and utility programs. It begins by explaining the differences between system software and application software. It then describes the functions of operating systems such as interfacing with users, booting the computer, configuring devices, managing resources and jobs, file management, security, and increasing efficiency through techniques like multitasking. Popular desktop operating systems like Windows, Mac OS, Linux, and mobile operating systems are also outlined. The document concludes by describing the roles of various utility programs that perform tasks like file management, searching, and disk management.
This document discusses various pricing strategies for new products and existing product lines. It covers market-skimming pricing versus market-penetration pricing for new products. It also discusses product mix pricing strategies such as product line pricing, optional product pricing, captive product pricing, by-product pricing, and product bundle pricing. Finally, it outlines different product adjustment strategies companies use, including discount pricing, segmented pricing, psychological pricing, promotional pricing, geographical pricing, dynamic pricing, and international pricing.
Advance communication through red tacton human area networking technology Pawan Sharma
WELCOME TO OUR PRESENTATION Its our great pleasure to presenting a paper at the NATIONAL CONFERENCE ON HUMAN COMPUTER INTERACTION IN ENGINEERING EDUCATION (NCHCIEE -2013) Organized by : Jahwaharlal institute of technology, borawa , dist khargone M.P Presented by : Mr. Pawan sharma Proff . Lokesh mehta Mr. Lokendre singh rathore (From SPITM, Mandleshwar dist khargone . M.p )
Advance Communication through Red Tacton -Human Area Networking Technology: Presented by : Mr. Pawan Sharma Proff . Lokesh mehta Mr. Lokendra Singh Rathore Advance Communication through Red Tacton -Human Area Networking Technology Dept. of Electronics & Communication
Bluetooth, infrared etc. were the most commonly used techniques for data transmission.
But these short-range wireless communication systems have some problems of packet collisions and it can be reduce by RED-TECTON.
The ultimate human area network solution to all these constraints of conventional technologies is “intra body” communication, in which the human body serves as the transmission medium.
The document discusses digital communication systems. It provides examples of digital communication including an email sent to invite team members to a meeting. It then explains the key building blocks of a digital communication system including the input source, source encoder, channel encoder, digital modulator, channel, digital demodulator, channel decoder, source decoder and output transducer. The document also discusses channels used for digital communication, causes of signal loss, and comparisons between digital and analog communication systems.
The document discusses digital communication systems and outlines topics that will be covered, including digital data communication, multiplexing techniques, digital modulation and demodulation, and performance comparisons of modulation schemes. The objectives are to provide an overview of communication systems and concepts, discuss digital transmission methods and modulation types, and enable students to design simple communication systems and discuss industry trends.
This chapter discusses various input and output devices for computers. It describes common input devices like keyboards, mice, pens, touchscreens, scanners, and digital cameras. It also covers pointing devices, audio input, display technologies, printers, and audio output devices. The chapter aims to explain the purpose and function of these devices and discusses types that are widely used today.
This document discusses input and output devices in chapter 4 of the 15th edition of the textbook "Understanding Computers: Today and Tomorrow". It covers keyboards, pointing devices, scanners, readers, digital cameras, audio input, display devices, and printers. The chapter aims to explain the purpose and functions of these common hardware devices used for data input, capture, and output.
Computer devices:Input and Output devices presentation by Abdul BasitUrwaTulWosqa
This document discusses input and output devices used in computing. It covers keyboards, pointing devices like mice and styluses, scanners and readers like barcode scanners and digital cameras. It also discusses audio input devices, display devices like monitors and projectors, and various printer technologies. The document provides details on the purpose and common types of each input/output device category. It aims to help readers understand the functions and technologies behind common hardware used for interacting with computers.
The document discusses various input and output devices used in computing. It covers keyboards and pointing devices like mice, styluses, and touch screens. It also covers scanners, readers, digital cameras, and audio input devices. For output, it discusses display devices, printers, and audio output. The purpose is to explain the functions of these common I/O hardware devices used with computers today.
This document provides an overview of input and output devices covered in Chapter 4 of the 15th edition of the textbook "Understanding Computers: Today and Tomorrow". It describes common input devices like keyboards, pointing devices, scanners, digital cameras and audio input. It also covers various types of display devices, printers and audio output. The document discusses the purpose, characteristics and examples of different input/output hardware technologies.
The document discusses various input and output devices used in computer systems. It describes common input devices like the keyboard, mouse, scanner, microphone, and touchscreen. It also discusses output devices such as monitors, printers, and speakers. Input devices are used to enter data and instructions into the computer, while output devices are used to communicate the results of processing to users.
1. The document discusses various computer input and output devices. It describes input devices like keyboards, pointing devices, microphones, scanners, and webcams that allow users to enter data. It also covers output devices such as displays, printers, speakers, projectors, and touchscreens that convey information to users.
2. The functions of common input devices like keyboards, mice, touchpads, microphones, and scanners are explained. Output devices and their uses are also outlined, including displays, printers, speakers, projectors, and interactive whiteboards.
3. Examples are given for many device types, along with diagrams and pictures to illustrate key points. Input and output are defined, and various devices are
The document provides an overview of computer hardware and input devices. It discusses the basic components of a computer system including the input, processing, storage and output units. It then describes various commonly used input devices such as keyboards, mice, scanners, microphones, webcams and touchscreens. Specific input devices like optical mark readers, bar code readers and digitizers are also explained along with their uses.
Input devices allow data and instructions to enter a computer. Common input devices include keyboards, mice, joysticks, light pens, trackballs, scanners, digitizers, microphones, magnetic ink card readers, optical character readers, bar code readers, and optical mark readers. Output devices send data from the computer to the user or another device. Common output devices are monitors, printers like laser and inkjet printers, plotters, sound cards, and screens.
This document provides an overview of common computer input and output devices. It discusses keyboards, pointing devices like mice and trackballs, and data entry devices such as scanners, microphones, and digital cameras as the main types of input devices. Under each category, specific examples are described in more detail, including how they function and typical uses. Output devices mentioned include displays for showing text, audio, video, and graphics.
Peripheral devices are hardware components that can be connected to a computer to allow input or output of data. Some common input devices described include keyboards, mice, scanners, digital cameras, and touch screens. Output devices receive processed data from the computer and display it, such as monitors which form images from pixels.
Input devices gather information from various sources and translate it into a format understood by computers. Common input devices include keyboards, mice, scanners, and digital cameras. Scanners allow importing of text, graphics, and images, while specialized software helps translate this information.
Output devices display processed information for users. Common soft copy output devices are monitors, which use pixels to display information and connect to computers via graphics cards. Hard copy devices like printers produce physical paper output, with impact printers using inked ribbons and non-impact printers like laser printers forming characters without physical contact. Other output devices include speakers, projectors, and plotters.
History of Multimedia Systems
- Newspapers were early adopters of multimedia, using text, graphics, and images. Radio and television further expanded multimedia capabilities for mass communication.
- Important developments included Bush's 1945 proposal of the Memex, the birth of the internet in the 1970s, and Tim Berners-Lee's 1989 proposal of the World Wide Web.
- Modern multimedia systems incorporate capture devices, storage, networks, computer systems, and high-quality display and output devices to process multiple media formats.
This document discusses various computer input devices and provides details about each one. It describes keyboards, graphics tablets, touch screens, barcode readers, MICR, OMR, OCR, magnetic stripes, joysticks, concept keyboards, chip readers, tracker balls, scanners, touch pads, PIN pads, light pens, and webcams. For each input device it provides information on where and when each one is commonly used.
The document discusses various computer input devices. It defines input devices as any hardware components that allow users to enter data and instructions into a computer. Examples of input devices mentioned include keyboards, pointing devices like mice and touchpads, scanners, microphones, webcams, touch screens, digital cameras, and various reading devices like optical character recognition. The functions and uses of these different input devices are described in detail.
The document provides an overview of computer systems and their components. It describes how a computer system is made up of both hardware and software. The computer hardware is divided into five main sections - input devices, output devices, the system unit, secondary storage devices, and communication networks. Input devices such as keyboards, mice, and scanners allow users to enter data. Output devices like monitors and printers allow users to see or print data. The system unit contains the central processing unit (CPU), memory, power supply, and motherboard. Secondary storage devices include hard drives for long-term storage. Communication networks connect the various components.
Computer input devices include the keyboard, mouse, joystick, light pen, track ball, scanner, graphic tablet, microphone, magnetic ink card reader, optical character reader, and bar code reader. The keyboard allows input of text, while the mouse is used to control cursor movement and select items. Other common input devices are the joystick for gaming, light pen for screen interaction, track ball in laptops, and scanner to digitize documents. Specialized readers include the magnetic ink card reader for bank checks, optical character reader to digitize text, and bar code reader for product labeling.
The document discusses various input devices used in computers. It describes keyboards, mice, joysticks, light pens, trackballs, scanners, graphics tablets, microphones, MICR readers, OCR readers, barcode readers, optical mark readers, and punch cards. The most common input devices are keyboards and mice, which allow users to input text and control the cursor. Other devices allow input of graphics, sound, and machine-readable text.
This chapter discusses computer security and privacy. It covers risks from hardware loss, damage, and failure, and ways to safeguard hardware through encryption, tracking software, and backups. It also addresses software piracy, digital counterfeiting, and their prevention. The chapter discusses privacy concerns regarding databases, electronic profiling, spam, and surveillance. It provides tips for protecting personal information and privacy online and offline. [/SUMMARY]
This chapter discusses databases and database management systems. It defines what a database is and the key components like tables, records, and fields. Relational databases are discussed in detail including how they are designed, created, and maintained using SQL queries and reports. Database classifications like single-user, multi-user, client-server and distributed models are covered. Common database models like hierarchical, network, relational, object-oriented, and hybrid models are described. The chapter concludes with how databases are widely used on the web for e-commerce, dynamic content, and personalized experiences.
This document provides an overview of program development and programming languages. It discusses different approaches to program design such as structured programming, object-oriented programming, aspect-oriented programming, and adaptive software development. It also describes the phases of the program development life cycle including problem analysis, program design, coding, debugging and testing. Common programming languages and tools that can facilitate the development process are also covered.
This chapter discusses information systems and the system development life cycle. It defines an information system as a system used to generate information to support organizational users. It describes common types of information systems such as transaction processing systems, decision support systems, and integrated enterprise systems. It also outlines the roles and responsibilities of information technology professionals involved in system development, including systems analysts. Finally, it details the key steps of the system development life cycle, from preliminary investigation and system analysis to implementation and maintenance.
This chapter discusses e-commerce and how businesses can implement online sales. It covers the advantages and disadvantages of e-commerce for businesses and consumers. Various e-commerce business models are identified, including business-to-consumer, business-to-business, and consumer-to-consumer. The chapter also outlines strategies for developing an effective e-commerce website, such as selecting a payment method, designing online ordering, and implementing security measures and marketing.
This document provides an overview of the key topics covered in Chapter 10, which include:
- Defining web-based multimedia and listing advantages and disadvantages of using it
- Describing common multimedia elements like text, images, animation, audio, and video
- Outlining basic steps for designing a multimedia website, such as determining objectives and intended audience
- Explaining the process of developing a multimedia website, including creating elements, using markup languages, and more
- Discussing the future of web-based multimedia and emerging technologies
This document discusses network and internet security. It covers unauthorized access and use, such as hacking. It also discusses ways to protect against unauthorized access, including access control systems, firewalls, encryption, and virtual private networks. Biometric authentication and controlling wireless network access are also covered as security measures.
This document discusses the evolution of the Internet and the World Wide Web. It describes how the Internet originated from ARPANET and evolved into a global network. It also discusses the development of the World Wide Web from early text-based pages to today's graphical content. The document outlines the various individuals and groups that make up the Internet community, such as users, internet service providers, and infrastructure companies. It also describes common methods for connecting to the Internet and selecting an internet service provider.
This chapter discusses intellectual property rights, ethics, health issues related to computer use, access to technology, and environmental impacts. It covers various types of intellectual property including copyrights, trademarks, patents, and digital rights management. Ethics topics include proper use of copyrighted material, information resources, and addressing issues like digital manipulation. Health sections explore physical risks from improper ergonomics as well as emotional stressors. Access barriers like the digital divide within and between countries are also examined.
"Scaling RAG Applications to serve millions of users", Kevin GoedeckeFwdays
How we managed to grow and scale a RAG application from zero to thousands of users in 7 months. Lessons from technical challenges around managing high load for LLMs, RAGs and Vector databases.
"Frontline Battles with DDoS: Best practices and Lessons Learned", Igor IvaniukFwdays
At this talk we will discuss DDoS protection tools and best practices, discuss network architectures and what AWS has to offer. Also, we will look into one of the largest DDoS attacks on Ukrainian infrastructure that happened in February 2022. We'll see, what techniques helped to keep the web resources available for Ukrainians and how AWS improved DDoS protection for all customers based on Ukraine experience
"$10 thousand per minute of downtime: architecture, queues, streaming and fin...Fwdays
Direct losses from downtime in 1 minute = $5-$10 thousand dollars. Reputation is priceless.
As part of the talk, we will consider the architectural strategies necessary for the development of highly loaded fintech solutions. We will focus on using queues and streaming to efficiently work and manage large amounts of data in real-time and to minimize latency.
We will focus special attention on the architectural patterns used in the design of the fintech system, microservices and event-driven architecture, which ensure scalability, fault tolerance, and consistency of the entire system.
QA or the Highway - Component Testing: Bridging the gap between frontend appl...zjhamm304
These are the slides for the presentation, "Component Testing: Bridging the gap between frontend applications" that was presented at QA or the Highway 2024 in Columbus, OH by Zachary Hamm.
Introducing BoxLang : A new JVM language for productivity and modularity!Ortus Solutions, Corp
Just like life, our code must adapt to the ever changing world we live in. From one day coding for the web, to the next for our tablets or APIs or for running serverless applications. Multi-runtime development is the future of coding, the future is to be dynamic. Let us introduce you to BoxLang.
Dynamic. Modular. Productive.
BoxLang redefines development with its dynamic nature, empowering developers to craft expressive and functional code effortlessly. Its modular architecture prioritizes flexibility, allowing for seamless integration into existing ecosystems.
Interoperability at its Core
With 100% interoperability with Java, BoxLang seamlessly bridges the gap between traditional and modern development paradigms, unlocking new possibilities for innovation and collaboration.
Multi-Runtime
From the tiny 2m operating system binary to running on our pure Java web server, CommandBox, Jakarta EE, AWS Lambda, Microsoft Functions, Web Assembly, Android and more. BoxLang has been designed to enhance and adapt according to it's runnable runtime.
The Fusion of Modernity and Tradition
Experience the fusion of modern features inspired by CFML, Node, Ruby, Kotlin, Java, and Clojure, combined with the familiarity of Java bytecode compilation, making BoxLang a language of choice for forward-thinking developers.
Empowering Transition with Transpiler Support
Transitioning from CFML to BoxLang is seamless with our JIT transpiler, facilitating smooth migration and preserving existing code investments.
Unlocking Creativity with IDE Tools
Unleash your creativity with powerful IDE tools tailored for BoxLang, providing an intuitive development experience and streamlining your workflow. Join us as we embark on a journey to redefine JVM development. Welcome to the era of BoxLang.
The Microsoft 365 Migration Tutorial For Beginner.pptxoperationspcvita
This presentation will help you understand the power of Microsoft 365. However, we have mentioned every productivity app included in Office 365. Additionally, we have suggested the migration situation related to Office 365 and how we can help you.
You can also read: https://www.systoolsgroup.com/updates/office-365-tenant-to-tenant-migration-step-by-step-complete-guide/
"NATO Hackathon Winner: AI-Powered Drug Search", Taras KlobaFwdays
This is a session that details how PostgreSQL's features and Azure AI Services can be effectively used to significantly enhance the search functionality in any application.
In this session, we'll share insights on how we used PostgreSQL to facilitate precise searches across multiple fields in our mobile application. The techniques include using LIKE and ILIKE operators and integrating a trigram-based search to handle potential misspellings, thereby increasing the search accuracy.
We'll also discuss how the azure_ai extension on PostgreSQL databases in Azure and Azure AI Services were utilized to create vectors from user input, a feature beneficial when users wish to find specific items based on text prompts. While our application's case study involves a drug search, the techniques and principles shared in this session can be adapted to improve search functionality in a wide range of applications. Join us to learn how PostgreSQL and Azure AI can be harnessed to enhance your application's search capability.
Conversational agents, or chatbots, are increasingly used to access all sorts of services using natural language. While open-domain chatbots - like ChatGPT - can converse on any topic, task-oriented chatbots - the focus of this paper - are designed for specific tasks, like booking a flight, obtaining customer support, or setting an appointment. Like any other software, task-oriented chatbots need to be properly tested, usually by defining and executing test scenarios (i.e., sequences of user-chatbot interactions). However, there is currently a lack of methods to quantify the completeness and strength of such test scenarios, which can lead to low-quality tests, and hence to buggy chatbots.
To fill this gap, we propose adapting mutation testing (MuT) for task-oriented chatbots. To this end, we introduce a set of mutation operators that emulate faults in chatbot designs, an architecture that enables MuT on chatbots built using heterogeneous technologies, and a practical realisation as an Eclipse plugin. Moreover, we evaluate the applicability, effectiveness and efficiency of our approach on open-source chatbots, with promising results.
Session 1 - Intro to Robotic Process Automation.pdfUiPathCommunity
👉 Check out our full 'Africa Series - Automation Student Developers (EN)' page to register for the full program:
https://bit.ly/Automation_Student_Kickstart
In this session, we shall introduce you to the world of automation, the UiPath Platform, and guide you on how to install and setup UiPath Studio on your Windows PC.
📕 Detailed agenda:
What is RPA? Benefits of RPA?
RPA Applications
The UiPath End-to-End Automation Platform
UiPath Studio CE Installation and Setup
💻 Extra training through UiPath Academy:
Introduction to Automation
UiPath Business Automation Platform
Explore automation development with UiPath Studio
👉 Register here for our upcoming Session 2 on June 20: Introduction to UiPath Studio Fundamentals: https://community.uipath.com/events/details/uipath-lagos-presents-session-2-introduction-to-uipath-studio-fundamentals/
Dandelion Hashtable: beyond billion requests per second on a commodity serverAntonios Katsarakis
This slide deck presents DLHT, a concurrent in-memory hashtable. Despite efforts to optimize hashtables, that go as far as sacrificing core functionality, state-of-the-art designs still incur multiple memory accesses per request and block request processing in three cases. First, most hashtables block while waiting for data to be retrieved from memory. Second, open-addressing designs, which represent the current state-of-the-art, either cannot free index slots on deletes or must block all requests to do so. Third, index resizes block every request until all objects are copied to the new index. Defying folklore wisdom, DLHT forgoes open-addressing and adopts a fully-featured and memory-aware closed-addressing design based on bounded cache-line-chaining. This design offers lock-free index operations and deletes that free slots instantly, (2) completes most requests with a single memory access, (3) utilizes software prefetching to hide memory latencies, and (4) employs a novel non-blocking and parallel resizing. In a commodity server and a memory-resident workload, DLHT surpasses 1.6B requests per second and provides 3.5x (12x) the throughput of the state-of-the-art closed-addressing (open-addressing) resizable hashtable on Gets (Deletes).
MySQL InnoDB Storage Engine: Deep Dive - MydbopsMydbops
This presentation, titled "MySQL - InnoDB" and delivered by Mayank Prasad at the Mydbops Open Source Database Meetup 16 on June 8th, 2024, covers dynamic configuration of REDO logs and instant ADD/DROP columns in InnoDB.
This presentation dives deep into the world of InnoDB, exploring two ground-breaking features introduced in MySQL 8.0:
• Dynamic Configuration of REDO Logs: Enhance your database's performance and flexibility with on-the-fly adjustments to REDO log capacity. Unleash the power of the snake metaphor to visualize how InnoDB manages REDO log files.
• Instant ADD/DROP Columns: Say goodbye to costly table rebuilds! This presentation unveils how InnoDB now enables seamless addition and removal of columns without compromising data integrity or incurring downtime.
Key Learnings:
• Grasp the concept of REDO logs and their significance in InnoDB's transaction management.
• Discover the advantages of dynamic REDO log configuration and how to leverage it for optimal performance.
• Understand the inner workings of instant ADD/DROP columns and their impact on database operations.
• Gain valuable insights into the row versioning mechanism that empowers instant column modifications.
Northern Engraving | Modern Metal Trim, Nameplates and Appliance PanelsNorthern Engraving
What began over 115 years ago as a supplier of precision gauges to the automotive industry has evolved into being an industry leader in the manufacture of product branding, automotive cockpit trim and decorative appliance trim. Value-added services include in-house Design, Engineering, Program Management, Test Lab and Tool Shops.
An All-Around Benchmark of the DBaaS MarketScyllaDB
The entire database market is moving towards Database-as-a-Service (DBaaS), resulting in a heterogeneous DBaaS landscape shaped by database vendors, cloud providers, and DBaaS brokers. This DBaaS landscape is rapidly evolving and the DBaaS products differ in their features but also their price and performance capabilities. In consequence, selecting the optimal DBaaS provider for the customer needs becomes a challenge, especially for performance-critical applications.
To enable an on-demand comparison of the DBaaS landscape we present the benchANT DBaaS Navigator, an open DBaaS comparison platform for management and deployment features, costs, and performance. The DBaaS Navigator is an open data platform that enables the comparison of over 20 DBaaS providers for the relational and NoSQL databases.
This talk will provide a brief overview of the benchmarked categories with a focus on the technical categories such as price/performance for NoSQL DBaaS and how ScyllaDB Cloud is performing.
Connector Corner: Seamlessly power UiPath Apps, GenAI with prebuilt connectorsDianaGray10
Join us to learn how UiPath Apps can directly and easily interact with prebuilt connectors via Integration Service--including Salesforce, ServiceNow, Open GenAI, and more.
The best part is you can achieve this without building a custom workflow! Say goodbye to the hassle of using separate automations to call APIs. By seamlessly integrating within App Studio, you can now easily streamline your workflow, while gaining direct access to our Connector Catalog of popular applications.
We’ll discuss and demo the benefits of UiPath Apps and connectors including:
Creating a compelling user experience for any software, without the limitations of APIs.
Accelerating the app creation process, saving time and effort
Enjoying high-performance CRUD (create, read, update, delete) operations, for
seamless data management.
Speakers:
Russell Alfeche, Technology Leader, RPA at qBotic and UiPath MVP
Charlie Greenberg, host
Lee Barnes - Path to Becoming an Effective Test Automation Engineer.pdfleebarnesutopia
So… you want to become a Test Automation Engineer (or hire and develop one)? While there’s quite a bit of information available about important technical and tool skills to master, there’s not enough discussion around the path to becoming an effective Test Automation Engineer that knows how to add VALUE. In my experience this had led to a proliferation of engineers who are proficient with tools and building frameworks but have skill and knowledge gaps, especially in software testing, that reduce the value they deliver with test automation.
In this talk, Lee will share his lessons learned from over 30 years of working with, and mentoring, hundreds of Test Automation Engineers. Whether you’re looking to get started in test automation or just want to improve your trade, this talk will give you a solid foundation and roadmap for ensuring your test automation efforts continuously add value. This talk is equally valuable for both aspiring Test Automation Engineers and those managing them! All attendees will take away a set of key foundational knowledge and a high-level learning path for leveling up test automation skills and ensuring they add value to their organizations.
"Choosing proper type of scaling", Olena SyrotaFwdays
Imagine an IoT processing system that is already quite mature and production-ready and for which client coverage is growing and scaling and performance aspects are life and death questions. The system has Redis, MongoDB, and stream processing based on ksqldb. In this talk, firstly, we will analyze scaling approaches and then select the proper ones for our system.
2. Learning Objectives
1. Explain the purpose of a computer keyboard and the types of
keyboards widely used today.
2. List several different pointing devices and describe their functions.
3. Describe the purposes of scanners and readers and list some types
of scanners and readers in use today.
4. Explain what digital cameras are and how they are used today.
5. Understand the devices that can be used for audio input.
6. Describe the characteristics of a display device and explain some of
the technologies used to display images.
7. List several types of printers and explain their function.
8. Identify the hardware devices typically used for audio output.
Understanding Computers: Today and Tomorrow, 14th Edition
2
2
3. Overview
• This chapter covers:
– Different types of keyboards and pointing devices
– Types of scanners, readers, and digital cameras
– Audio input devices
– Types of display devices and how they work
– Types of printers and how they work
– Audio output
Understanding Computers: Today and Tomorrow, 14th Edition
3
3
4. Keyboards
• Keyboard
– An input device used to enter characters at the location marked
by the insertion point or cursor
– Can be wired or wireless
– Most computers today are designed to be used with a keyboard
– Typically contains:
• Standard alphanumeric keys
• Numeric keypad
• Function keys
• Delete and Backspace keys
• Control and Alternate keys
• Arrow directional keys and special keys
Understanding Computers: Today and Tomorrow, 14th Edition
4
6. Keyboards
– Portable computers and mobile devices often use:
• Built in or slide-out keyboard
• Pen or touch input (on-screen keyboard)
• Keyboard dock
Understanding Computers: Today and Tomorrow, 14th Edition
6
7. Pointing and Touch Devices
• Pointing Devices are used to:
– Select and manipulate objects
– Input data
– Issue commands to the computer
• Common Types of Pointing Devices:
– Mouse
– Pen/stylus
– Touch screen
Understanding Computers: Today and Tomorrow, 14th Edition
7
8. Pointing and Touch Devices
• Mice
– Mouse
• Common pointing device that the user slides along a
flat surface to move a pointer around the screen and
clicks its buttons to make selections
• Older mechanical mice use a ball
• Optical or laser mice track with light
– 3D mice
– Can be wireless
Understanding Computers: Today and Tomorrow, 14th Edition
8
9. Pointing and Touch Devices
Understanding Computers: Today and Tomorrow, 14th Edition
9
10. Pointing and Touch Devices
• Pens/Styluses
– Stylus
• Pen-like device used to draw or write electronically on
the screen
• Also called digital pen, electronic pen, tablet pen
• Pen input is being used for
– Photography, graphic design, animation
– Industrial design, document processing, and
healthcare applications
– Issuing commands and inputting data
Understanding Computers: Today and Tomorrow, 14th Edition
10
11. Pointing and Touch Devices
– Pen-Based Computers
• Pen input used with mobile devices and tablet
computers
– Used to input handwritten text and sketches and to
manipulate text
– If handwriting recognition is used, written text can
be converted to editable typed text
Understanding Computers: Today and Tomorrow, 14th Edition
11
12. Pointing and Touch Devices
Understanding Computers: Today and Tomorrow, 14th Edition
12
13. Pointing and Touch Devices
– Digital Writing Systems
• Pen-based systems that capture handwritten input as it
is being written
• Requires special paper with a grid of dots
• Handwritten input can be transferred to computer
– Graphics Tablets
• Pen tablets or digitizing devices
• Flat, touch sensitive tablet typically connected to
computer using a USB port
Understanding Computers: Today and Tomorrow, 14th Edition
13
14. Pointing and Touch Devices
– Signature Capture Devices
• Found at check out counters to record customer
signatures
Understanding Computers: Today and Tomorrow, 14th Edition
14
15. Pointing and Touch Devices
• Touch Screens
– Display devices that are touched with the finger to select
commands or otherwise provide input to the computer
– Used with:
• Desktop and portable computers
• Mobile phones and other mobile devices
• Surface computing
– Multi-touch input from multiple users and object
recognition
• Consumer kiosks and Point-of-Sale systems
Understanding Computers: Today and Tomorrow, 14th Edition
15
16. Pointing and Touch Devices
Understanding Computers: Today and Tomorrow, 14th Edition
16
17. Pointing and Touch Devices
• Other Pointing Devices
– Joysticks, gamepads,
and other gaming
devices
– Trackballs
– Buttons and wheels
– Touch pads
Understanding Computers: Today and Tomorrow, 14th Edition
17
18. Quick Quiz
1. An optical mouse is ____________.
a. the same as a wireless mouse
b. a mouse that tracks movements with light instead of a ball
c. a mouse that contains a scroll wheel on the top
2. True or False: With handwriting recognition, text is input as a
graphical image so the text cannot later be edited as text.
3. An input device that looks like an upside-down mouse with
the ball on top is a(n) ____________.
Answers:
1) b; 2) False; 3) trackball
Understanding Computers: Today and Tomorrow, 14th Edition
18
19. Scanners, Readers, and Digital
Cameras
• Source Documents
– Containing data that already exists in physical form (order
form, photograph, invoice, check, or price label)
• Source Data Automation
– Captures data directly from a source
document
• Saves time
• Increases accuracy
• Utilizes scanning or
reading devices
Understanding Computers: Today and Tomorrow, 14th Edition
19
20. Scanners, Readers, and Digital
Cameras
• Scanners (Optical Scanners)
– Input devices that capture an image of an object and transfers it
to a computer in digital form
– Can scan photos, documents, drawings (flat objects)
– Data is typically input as a single image
– If optical character recognition (OCR) is used, text is input as
individual text characters
– Types of scanners
• Flatbed
• Portable
• 3D
• Integrated (ATMs, etc.)
Understanding Computers: Today and Tomorrow, 14th Edition
20
21. Scanners, Readers, and Digital
Cameras
Understanding Computers: Today and Tomorrow, 14th Edition
21
22. Scanners, Readers, and Digital
Cameras
• Scanning Quality and Resolution
– Quality of scanned images
indicated by optical resolution
• Measured in number of
dots per inch (dpi)
• Can often be specified
when image is scanned
• Can be changed when
scanned image is edited
• Varies with scanner used
– Higher resolution means better
quality but larger file size
Understanding Computers: Today and Tomorrow, 14th Edition
22
23. Scanners, Readers, and Digital
Cameras
• Readers
– Barcode Readers
• Input devices that read barcodes
– Barcodes
• Machine-readable codes that represent data as
a set of bars
• Common Types
– Universal Product Code (UPC)
– ISBN
– Code 39 – nonfood use
– Intelligent mail barcode – US Postal Service
– Two Dimensional 2D (QR) – stores more data
Understanding Computers: Today and Tomorrow, 14th Edition
23
24. Scanners, Readers, and Digital
Cameras
Understanding Computers: Today and Tomorrow, 14th Edition
24
25. Scanners, Readers, and Digital
Cameras
Understanding Computers: Today and Tomorrow, 14th Edition
25
26. Scanners, Readers, and Digital
Cameras
– Radio Frequency Identification
(RFID) Readers
• Technology used to store and
transmit data located in RFID tags
• RFID tags contain tiny chips and
radio antennas
– Attached to objects for
identification purposes
– Read by RFID readers
– Tags only need to be within
range of the reader, rather
than in the line of sight
Understanding Computers: Today and Tomorrow, 14th Edition
26
27. Scanners, Readers, and Digital
Cameras
• Applications
– Tracking inventory and assets
– Electronic tolls
– Tracking patients in hospitals
– Ticketing applications
– Security: Speeding up ID process
• Types of RFID Readers
– Handheld
– Portal
– Stationary
• Slow to catch on in retail industry due to privacy and
security issues
Understanding Computers: Today and Tomorrow, 14th Edition
27
28. Scanners, Readers, and Digital
Cameras
Understanding Computers: Today and Tomorrow, 14th Edition
28
29. Scanners, Readers, and Digital
Cameras
– Optical Mark Readers (OMRs)
• Input data from special forms to score or tally
exams, questionnaires, ballots
– Optical Character Recognition (OCR) Devices
• OCR is the ability of a computer to recognize scanned
text characters and convert them to electronic form as
text, not images
• OCR readers can recognize many different types of
printed characters
• Used to process turnaround documents like monthly
bills
Understanding Computers: Today and Tomorrow, 14th Edition
29
30. Scanners, Readers, and Digital
Cameras
Understanding Computers: Today and Tomorrow, 14th Edition
30
31. Scanners, Readers, and Digital
Cameras
– Magnetic Ink Character Recognition (MICR) Readers
• Also called check scanners
• Used primarily for banking
• Read the special magnetic
characters printed at the
bottom of checks
• High volume readers sort and
process deposited checks
• Used to facilitate remote
deposits and electronic check
processing
Understanding Computers: Today and Tomorrow, 14th Edition
31
32. Scanners, Readers, and Digital
Cameras
– Biometric Readers
• Used to input biometric data--science of identifying
individuals based on measurable biological
characteristics
– Fingerprint, hand or face geometry, voice or
signature
• Can be stand-alone or built into another piece of
hardware
• Used to allow access only by authorized individuals
• Most often used for access control, to verify
transactions, and to authorize electronic payments
Understanding Computers: Today and Tomorrow, 14th Edition
32
33. Scanners, Readers, and Digital
Cameras
Understanding Computers: Today and Tomorrow, 14th Edition
33
34. Scanners, Readers, and Digital
Cameras
• Digital Cameras
– Record images on digital storage medium rather than film
– Can either be still cameras or video cameras
– Integrated into many portable computers and mobile
phones.
• Digital Still Cameras
– Available in a wide variety of sizes and capabilities
– Primary appeal is images are immediately available
– Camera quality is measured in megapixels
– Typically use flash memory for storage
– Camera phones can be used to read barcodes, for mobile
deposit, etc.
Understanding Computers: Today and Tomorrow, 14th Edition
34
35. Scanners, Readers, and Digital
Cameras
Understanding Computers: Today and Tomorrow, 14th Edition
35
36. Scanners, Readers, and Digital
Cameras
• Digital Video Cameras
– Digital camcorders, PC video cameras (PC cams, Web cams)
– Built-in or stand alone
– Store images on digital media (flash memory, DVDs, hard
drives, etc.)
• Applications
– Surveillance video
cameras
– Video conferences
and Webinars
– Face recognition
systems
Understanding Computers: Today and Tomorrow, 14th Edition
36
37. Audio Input
• Voice Input and Speech Recognition Systems
– Audio Input
• The process of entering audio data into the computer
– Voice Input
• Inputting spoken words and converting them to digital
form via microphone or headset
• Recorded for narrations, podcasts, etc.
• VoIP (Voice over IP systems) applications
• Provides spoken instructions to computer when used
with speech recognition systems
Understanding Computers: Today and Tomorrow, 14th Edition
37
39. Audio Input
• Music Input Systems
– Used to input music
• Existing music can be input
using CDs or a Web download
• For original
compositions, microphones
and keyboard controllers
(piano keyboards) can be
connected to a computer
Understanding Computers: Today and Tomorrow, 14th Edition
39
40. Quick Quiz
1. Which of the following is used in conjunction with Scantron test
forms, voting ballots, and other documents in which the selection is
bubbled in?
a. OCR
b. MICR
c. OMR
2. True or False: Flatbed scanners can be used to scan photos, as well
as documents on conventional paper.
3. A voice input system requires software and a(n)
_______________________ in order to input voice data or
commands into a computer.
Answers:
1) c; 2) True; 3) microphone
Understanding Computers: Today and Tomorrow, 14th Edition
40
41. Display Devices
• Display Device
– Presents output visually on some type of screen
– Monitor
• Display device for a desktop computer
– Display Screen
• Screen built into a variety of devices
– Notebook and other portable computers
– Mobile phones and mobile devices
– Handheld gaming devices, home entertainment
devices, kitchen appliances
– Digital photo frames, e-book readers
– Digital signage systems, digital billboards
Understanding Computers: Today and Tomorrow, 14th Edition
41
43. Display Devices
• Display Device Characteristics
– Color vs. Monochrome Displays
• Images are formed using pixels
• Most displays today are color
displays
– CRT vs. Flat-Panel Displays
• Cathode ray tube (CRT)
displays are large, bulky, and
heavy
• Flat-panel displays take up
less desk space and use less
power than CRTs
Understanding Computers: Today and Tomorrow, 14th Edition
43
44. Display Devices
– Size and Aspect Ratio
• Device size measured diagonally from corner to corner
– Screen Resolution
• Number of pixels used on a display determines
resolution
Understanding Computers: Today and Tomorrow, 14th Edition
44
45. Display Devices
– Video adapters, Interfaces, and Ports
• Video cards determine the graphic capabilities of a
computer
• VGA, DVI, and HDMI are the three most common
interfaces to connect monitors to a computer
• Ports exposed in the system unit cases are to connect
monitors to computers
– New option is to use USB
ports
Understanding Computers: Today and Tomorrow, 14th Edition
45
47. Display Devices
– Wired vs. Wireless Displays
• Most monitors are physically connected to the system
via a cable (wired)
• Wireless displays connect using a wireless network
connection (Wi-Fi, Bluetooth)
– 2D vs. 3D
• Most displays are 2D
• 3D displays use filters, prisms, and multiple lenses to
create the 3D effects
Understanding Computers: Today and Tomorrow, 14th Edition
47
48. Display Devices
– Wearable Displays
• Project images from a
mobile device to a display
screen built into glasses
– Touch and Gesture Capabilities
• Kiosks and portable gaming
devices
• Mobile phones and
portable digital media
players
Understanding Computers: Today and Tomorrow, 14th Edition
48
49. Display Devices
• Flat Panel Display Technologies
– Liquid Crystal Displays (LCDs)
• Use charged liquid crystals between sheets of glass or
plastic
• Requires backlighting
– Light Emitting Diode Displays (LEDs)
• Used in alarm clocks, Christmas lights, car
headlights, and other consumer products
• Currently used to backlight LCD panels
Understanding Computers: Today and Tomorrow, 14th Edition
49
50. Display Devices
– Organic Light Emitting Diode
Displays (OLED)
• Use layers of organic
material
• Emit visible light when
current is applied
• Are thinner than LCDs
• Have brighter and
sharper images than LCDs
• Incorporated into many
digital cameras, mobile
phones, and portable digital
media players
Understanding Computers: Today and Tomorrow, 14th Edition
50
51. Display Devices
– Special Types of OLEDs
• FOLED (Flexible OLED)
– OLED displays built on flexible surfaces such as
plastic or metal foil
• TOLED (Transparent OLED)
– Displays are transparent
– Emit light toward top and bottom of display surface
• PHOLED (Phosphorescent OLED)
– Process that converts electrical energy into light
rather than heat
Understanding Computers: Today and Tomorrow, 14th Edition
51
53. Display Devices
– Interferometric Modulator (IMOD)
Displays
• Essentially a complex mirror that
uses external light to display
images
• Designed initially for mobile
phones and portable devices
• Images are bright and clear, even
in sunlight
– Plasma Displays
• Use layers of gas to display
images
• Most often used on large displays
• Being replaced by LCDs
Understanding Computers: Today and Tomorrow, 14th Edition
53
54. Display Devices
• Data and Multimedia Projectors
– Display devices that projects all computer output to a wall
or projection screen
– Found in classrooms and conference rooms
– Can be wireless or integrated into devices
– Some contain an iPod dock
– Pico projectors are pocket-size and connect mobile and
portable devices
– Hologram projectors used to display 3D images
– Tiled projectors use multiple projectors to display content
from a single source
Understanding Computers: Today and Tomorrow, 14th Edition
54
56. Printers
• Printer Characteristics
– Printing Technology
• Impact Printers (Dot Matrix)
– Print mechanism actually strikes
the paper to transfer ink
– Used to produce multipart forms
• Non-impact Printers (Ink-Jet and
Laser)
– Use liquid ink or toner
– Produce higher quality images
– Much quieter than impact
printers
Understanding Computers: Today and Tomorrow, 14th Edition
56
57. Printers
– Color vs. Black and White
• Colors printers use magenta, cyan, yellow, and black ink
– Personal vs. Network Printers
• Personal printers connect directly to a single computer
• Network printers connect directly to a network so they
can be used by all authorized network users
– Print Resolution
• Measured in dpi (dots per inch)
• More dots per inch results in higher quality output
• 300 dpi for general purpose printing; 1,200 dpi for
photographs; 2,400 dpi for professional applications
Understanding Computers: Today and Tomorrow, 14th Edition
57
59. Printers
– Print Speed
• Measured in pages per minute (PPM)
• Personal printers – 20-35 ppm
• Network printers – 30 to 65 ppm
– Connection Options
• USB connection most common
– Multifunction Capabilities
• Copy, fax, scan, print
• All-in-ones
Understanding Computers: Today and Tomorrow, 14th Edition
59
60. Printers
• Laser Printers
– Use toner powder and technology similar to that of a
photocopier to produce images on paper
– The standard for business documents
– Print one entire page at a time
– Generally faster and have better quality output than ink-jet
printers
– Can be black and white or color
– Common print resolution for laser printers is between 600
and 2,400 dpi
– Use toner cartridges
Understanding Computers: Today and Tomorrow, 14th Edition
60
61. Printers
• Ink-Jet Printers
– Sprays droplets of ink to produce images on paper
– Use ink cartridges
– Usually print in color
– Often the choice for home use
– Relatively inexpensive with good-quality output
– Print more slowly than laser printers
– Newer printers with full width printheads are much faster
– Potential applications for the future
• Dispensing liquid metal, aromas, computer chips and
other circuitry, “printing” human tissue
Understanding Computers: Today and Tomorrow, 14th Edition
61
63. Printers
• Special Purpose Printers
– Photo Printers
– Barcode, label, and postage printers
– Portable printers
– Plotters and wide-format ink-jet printers
– 3D printers
Understanding Computers: Today and Tomorrow, 14th Edition
63
64. Audio Output
• Audio Output
– Voice, music, and other audible sounds
– Common audio output devices
• Computer speakers
• iPod/MP3 dock and integrated speakers
• Headphones and headsets
• Earphones and earbuds
Understanding Computers: Today and Tomorrow, 14th Edition
64
65. Quick Quiz
1. Which of the following types of display devices should have the
largest footprint (the amount of room taken up on a desk)?
a. CRT monitor
b. OLED display
c. LCD display
2. True or False: Laser printers can only print in black and white.
3. ______________________ printers form images with drops of liquid
ink.
Answers:
1) a; 2) False; 3) Ink-jet printers
Understanding Computers: Today and Tomorrow, 14th Edition
65
66. Summary
•
•
•
•
•
•
•
Keyboards
Pointing and Touch Devices
Scanners, Readers, and Digital Cameras
Audio Input
Display Devices
Printers
Audio Output
Understanding Computers: Today and Tomorrow, 14th Edition
66