Timeline about the four generations of the history of computers.

1. 1942
The first
electromechanical
computer
1959-1963
The Second Generation
Were created the
transitors and
magnetic tape and disks
began to replace
punched cards as
external storage devices
1951-1958
The First Generation
First commercial
automatic computers
1979-Present
Fourth Generation
Integrated circuits
were large-scale.
The
microprocessos
appared in the
houses like PC´S, a
very easy
lenguage software
1964-1979
The Third Generation
Appeared the
integrated circuits.
Magnetic core internal memories began to give
way to a new form, metal oxide semiconductor
(MOS) memory, which, like integrated
circuits, used silicon-backed chips.