
1600’s • Blaise Pascal • Pascaline • Gottrfried von Leibniz • Improved on Pascaline
1600’s Pascaline Blaise Pascal
Early 1800’s • Joseph Marie Jacquard • Jacquard’s Loom • Charles Xavier Thomas • Arithometer
Early 1800’s Jacquard’s Loom
Mid-1800’s Charles Babbage Countess Ada Lovelace
Mid 1800’s Analytical Engine
1945 - 1956 • First Generation Computers • Used Vacuum tubes • Each computer had its own machine language • Examples: • Colossus • ENIAC • UNIVAC
1945 - 1956 ENIAC
1945 - 1956 UNIVAC
1945 - 1956 • Term “Computer Bug” coined by Admiral Grace Hopper
1956 - 1963 • Second Generation Computers • Transistors replaced vacuum tubes • Era of the punch cards • Examples • LARC • Stretch • IBM 1401
1956 - 1963 IBM 7094 IBM 1401
1964 - 1971 • Third Generation Computers • Integrated Circuits replaced transistors • Operating System used • Examples • IBM System 360 • Cray
1964 - 1971 Cray 23 Cray 29
1964 - 1971 IBM System 360
1971 - present • Fourth generation computers • Large Scale Integration (LSI) • Very Large Scale Integration (VLSI) • Ultra Large Scale Integration (ULSI) • Era of the Personal Computer • Pioneering Examples • Commodore • Radio Shack • Apple • IBM
1971 - present Dell Dimension 8200 IBM PC 1
1971 - present • ASCI White • Most powerful computing platform ever built! • 12.3 TeraOps (12,300,000,000,000 operations per second)
1971 - present • 1981 – 2 million computers in use • 1982 – 5.5 million computers in use • 1992 – 65 million personal computers