Abacus
Astrolabe
Da Vinci's Mechanical Calculator (1502)
Napier's Bones (1617) Blaise Pascal (1623) Pascals Arithmetic Machine (1642) Gottfried Wilhelm Von Leibinz (1646) Stepped Reckoner (1672)
Charles Babbage (1791)
Jacquards Loom (1804) Lady Ada Lovelace (1815) George Boole (1815) Difference Engine (1830) Analytical Engine (1840) Slide Rule (1859) Herman Hollerith (1890) Hollerith Machine (1890)
John V Atanasoff (1903) John Von Neumann (1903) Grace Hopper (1906) John W Maunchly (1907)
Alan Turing (1912) John P. Eckert (1919)
Jack Kilby (1923)
Niklaus Wirth (1934) Turing Machine (1936) ABC (1937) Harvard Mark 1 (1937)
Zuse Z3 (1941) Colossus MK ll (1944) UNIVAC (1946) BINAC (1946) ENIAC (1946) EDVAC(1946) EDSAC (1947) Transistor (1947) Manchester Baby (1948)
Bjarne Stroustrup (1950) Mainframe Computer (1951) FORTRAN (1952) Bill Gates (1955) Steve Jobs (1955) Integrated Circuit (1959) COBOL (1959)
Minicomputer (1960) BASIC (1964)
PASCAL (1970) CP/M (1971) Microprocessor (1971) Intel 4004 (1971) C (1972) Smalltalk (1972) UNIX (1973) Cray Supercomputer (1975) Altair Computer (1975) Apple II (1977) C Plus (1979)
Original IBM PC (1981) Xerox Star (1981) Original Apple Macintosh (1984) NeXT (1985)
Linux (1991)