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history of computers

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Leah Gonzales

The document outlines the history of computers from earliest mechanical devices like the abacus and slide rule through generations of electronic computers using vacuum tubes, transistors, and integrated circuits. It describes the evolution from room-sized computers like ENIAC to microcomputers and personal computers, noting the development of the microprocessor and key periods defined by Windows operating systems and Internet connectivity.

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HISTORY OF COMPUTERS
EARLIEST COMPUTERS Abacus
Napiers Bones
Ougthreds 際際滷 Rule
Pascals Calculator
Leibnizs Calculator
Babbages Difference Engine and the Analytical Engine
Holleriths Punch Card Machine
EARLY ELECTRONIC COMPUTERS Mark I
ENIAC
EDVAC
GENERATIONS OF ELECTRONIC COMPUTERS First Generation (1950s)
Second Generation (Early to Mid-1960s) Transitors Third Generation (Mid to Late-1960s) Integrated solid-state circuitry Fourth Generation (1970s onwards) The development of the microprocessor
GENERATIONS OF PERSONAL COMPUTERS Early Microcomputers (Mid- to late- 1970s) The PC Generation (Early- to late-1980s)
The Windows Generation (Early- to Mid- 1990s) The Internet Generation (Late-1990s to present)

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history of computers