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Computational DevicesAbacus first counting and calculating toolPunched Cards contains digital information forInputting programs and dataCreated by Herman Hollerith

AbacusInventors contEckert and Mauchly American physicists and computer designersTim Berners-Lee invented the World Wide WebMarc Andreesen Mosaic and Netscape co-authorHerman Hollerith inventor of punched cards

Eckert & MauchlyInventors and DevelopersSteve Jobs co-founder and CEO of Apple Inc.Steve Wozniak co-founder of AppleAlso was computer engineer/programmerBill Gates co-founder of MicrosoftPaul Allen co-founder of Microsoft

The InternetARPANET first operational switching networkLed to the Global InternetMosaic first browser and had WWWDepartment of Defense started ARPANET across U.S.

Computer Generations1st Gen. (1946-1958) Vacuum Tubes

2nd Gen. (1959-1964) Transistors

3rd Gen. (1965-1970) Integrated CircuitsComputer History TopicsEarliest Computational DevicesEarliest ComputersImportant Inventors and DevelopersThe InternetGenerations of ComputersMore InventorsCharles Babbage (Father of Computing) Originated programmable computer conceptBlaise Pascal French mathematician who invented calculatorsJon von Newman theory of quantum mechanics