- 1642 -Mathematician and philosopher B.Pascal,invented and built his first cranked computing machine. It could only add and subtract.
- 1694 -gootfried von leibniz,germany,makes a machine that can multiply numbers
- 1820 -charles xavier de colmar,france,makes an "Arithometer"that can add,subtract,multiply and divide
- 1822 -charles babbage,england,devises his dieewrence engine
- 1829 -wheatstone uses punched paper tape to store data
- 1834 -babbage conceives the analytical engine
- 1889 -hollerith's punch card machine used in us census
- 1928 -IBM adopts 80-columm punched card
- 1944 -harvard's mark I,first digital computer
- 1952 -univac computer accurately predicts the us presidential
- 1953 -first IBM electronic digital computer(IBM 701)
- 1956 -first hard disk drive(IBM).term"artificial intelligence" devices
- 1958 -first chess game between computer and human
- 1960 -usa has 6,000 computers
- 1963 -ASCII(american standard for information interchange) introduces
- 1967 -IBM releases floppy disk
- 1970 -douglas engelbart patents first computer mouse
- 1971 -intel builds the microprocessor,"computer on a chip".wang 1200,world's first word processor
- 1972 -e-mail invented by ray tomlinson.first electronic video game,Pong
- 1975 -microsoft founded by william H. gates,later to become the world's richest person
- 1976 -first apple computer.cray-1,first supercomputer
- 1979 -compuserve launches first commercial bulletin board service
- 1980 -usa has more than one million computers.first laptop computers
- 1981 -first nintendo home video game.commercial introduction of the computer mouse.microsoft introduces software for IBM personal computers
- 1982 -worldwide, 200 computers connected to the internet
- 1984 -apple macintosh computers launched
- 1985 -microsoft ships windows 1.0
- 1986 -usa has more than 30 million computers
- 1988 -4.7 million microcomputers,120,000 minicomputers and 11,500 mainframe computers sold in usa 1989 -100,000 hosts on the net
- 1990 -world wide web described by tim berners-lee.first palmtop computers
- 1991 -first use of the phrase''surfing the net' ,by jean armour polly
- 1993 -mosaic,the first graphical internet browser,launched
- 1994 -135 million PCs worldwide.first ads on the world wide web
- 1995 -amazon.com internet bookseller founded.microsoft's internet explorer browser launched
- 1999 -150 million people use internet worldwide
- 2000 -dot-com crash
- 2002 -ipod digital music players launched
- 2005 -nearly 200 million broadband lines worldwide
- 2006 -sales of ipods exceed 40 million.more than 1 billion people use the internet.
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