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History of Computers

Computer Timeline

  • l000BC The abacus

  • 1621 The slide rule invented

  • 1625 Wilhelm Schickard’s mechanical calculator

  • 1822 Charles Babbage’s Difference Engine

  • 1926 First patent for a semiconductor transistor

  • 1937 Alan Turing invents the Turing Machine

  • 1939 Atanasoff-Berry Computer created at Iowa State

  • the world’s first electronic digital computer

  • 1939 to 1944 Howard Aiken’s Harvard Mark I (the IBM ASCC)

  • 1940 Konrad Zuse -Z2 uses telephone relays instead of mechanical logical circuits

  • 1943 Collossus - British vacuum tube computer

  • 1944 Grace Hopper, Mark I Programmer (Harvard Mark I)

  • 1945 First Computer “Bug”, Vannevar Bush "As we may think"

  • 1948 to 1951 The first commercial computer — UNIVAC

  • 1952 G.W.A. Dummer conceives integrated circuits

  • 1954 FORTRAN language developed by John Backus (IBM)

  • 1955 First disk storage (IBM)

  • 1958 First integrated circuit

  • 1963 Mouse invented by Douglas Englebart

  • 1963 BASIC (standing for Beginner’s All Purpose Symbolic Instruction Code) was written (invented) at Dartmouth College, by mathematicians John George Kemeny and Tom Kurtzas as a teaching tool for undergraduates

  • 1969 UNIX OS developed by Kenneth Thompson

  • 1970 First static and dynamic RAMs

  • 1971 First microprocessor: the 4004

  • 1972 C language created by Dennis Ritchie

  • 1975 Microsoft founded by Bill Gates and Paul Allen

  • 1976 Apple I and Apple II microcomputers released

  • 1981 First IBM PC with DOS

  • 1985 Microsoft Windows introduced

  • 1985 c++ language introduced

  • 1992 Pentium processor

  • 1993 First PDA

  • 1994 JAVA introduced by James Gosling

  • 1994 Csharp language introduced

  • 1995 Java programming language, developed by Sun Microsystems

  • 1995 Metacrawler WWW meta-search engine

  • 1995 The first online bookstore,, is launched in Seattle by Jeffrey P. Bezos

  • 1995 Altavista WWW crawler search engine is built by Digital around the Digital Alpha processor

  • 1996 Google began as a research project by Larry Page and Sergey Brin

  • 1997 DYD technology is released

  • 1998 Kevin Warwick, Professor of Cybernetics at the University of Reading in the U.K., became the first human to host a microchip

  • 1999 Netomat: The Non-Linear Browser, by the New York artist Maciej Wisniewski, launched

  • 1999/2000 Wikipedia begins as an offshoot of Nupedia by Jimmy Wales and Larry Sanger

  • 2000 onwards changes known to all of us

History of Computers
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