Professor Mindy McAdams's presentation about vacuum tubes, microprocessors, and connections between radio, World War II, and computer technology

1. From Tube to Chip Presentation by Mindy McAdams Thursday, Week 13

2. In 1895, French scientist Jean B. Perrin discovered that “ cathode rays ” were negatively charged particles. Between 1895 and 1897, British physicist Joseph J. Thompson conducted further experiments and sought to measure the properties of these particles. The negatively charged particles were later named electrons .

7. The ENIAC computer, University of Pennsylvania, 1945

8. Size: over 100 feet long, filling a 30 ft. x 50 ft. room. Height: 10 feet. Depth: about 3 feet. Weight: about 30 tons. Cost: about $486,000 ENIAC

10. You could build (and repair) your own TV set

15. Whirlwind used approximately 5,000 vacuum tubes. It took 3 years to build and first went online in 1951. Budget: $1 million per year.

18. [1954]

19. Edwin Howard Armstrong and the first portable radio, 1923

27. Texas Instruments handheld calculator (c. 1975) Busicom handheld calculator (1972)

31. 1975: The MITS Altair 8800 Based on the Intel 8080 CPU World’s first “personal” computer

32. Two guys in Boston sent a letter to the Altair's inventor, asking if he would be interested in selling their BASIC programming language for the machine …

35. From Tube to Chip Presentation by Mindy McAdams University of Florida