History of Computers By royaloreos3 Mar 3, 1200 Abacus is invented Mar 3, 1642 Blasie Pascal designed 1st gear driven machine Feb 4, 1880 Hollerith develops counting machine Apr 3, 1937 George Stibitz uses relays for a demonstration adder Laboratories scientist George Stibitz uses relays for a demonstration adder Feb 4, 1941 Zuse finishes Z3 computer Feb 4, 1943 Relay Interpolator Feb 4, 1944 IBM builds Mark 1 Feb 4, 1944 Curta Calculator Feb 4, 1946 vaccum tubes were created for computers Feb 4, 1950 transistors replace vaccum tubes Feb 4, 1950 Simon 1 computer Feb 4, 1950 EDSAC computer completed Feb 4, 1971 First MicroProcesser created Feb 4, 1975 first real microcomputer Feb 4, 1976 Apple is founded Feb 4, 1979 intel 8088 microprocessor Feb 4, 1979 Motorola 68000 microprocessor Feb 4, 1980 Commodore VIC-20 Feb 4, 1981 IBM PC Feb 4, 1982 Intel 80286 and commodore 64 Feb 4, 1983 IBM PC Jr. and IBM PC/XT Feb 4, 1984 Motorala 68020 Feb 4, 1986 Intel 386 Feb 4, 1987 IBM PS/2 Feb 4, 1989 Laser 128 released Feb 4, 1992 intel 486-DX2 Feb 4, 1992 Powerbook laptops released Period: Feb 4, 1997 to Feb 4, 1999 intel pentium II and III Feb 4, 2003 PowerMac 205 released Feb 4, 2006 Amazon Kindle Feb 4, 2012 Rasberry Pi released Feb 4, 2015 Apple watch Feb 4, 2016 Babbage made analytical machine