(1) Key board — Herman Hollerith,
first keypunch device in 1930’s
(2) Transistor — John Bardeen,
Walter Brattain & Wiliam Shockley (1947 - 1948)
(3) RAM — An Wang and Jay
Forrester (1951)
(4) Trackball — Tom Cranston and
Fred Longstaff (1952)
(5) Hard Disk — IBM , The IBM
Model 350 Disk File (1956 )
(6) Integrated Circuit— Jack Kilby
& Robert Noyce (1958)
(7) Computer Mouse — Douglas
Engelbart (1964)
(8) Laser printer— Gary Stark
weather at XEROX in 1969.
(9) Floppy Disk— Alan Shugart &
IBM( 1970)
(10) Microprocessor — Faggin,
Hoff & Mazor – Intel 4004
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