
The History of Computers Dr. Ray Cafolla
Ancient “Computers” • Fingers and toes • Stones • Abacus (3000 bc)
The Forerunners of Computers • 1620 Napier's bones • 1642 Blaise Pascal (Pascaline)
The Forerunners of Computers • 1670 Leibnitz’ Stepped Reckoner
The Difference Engine Babbage's Analytical Engine (1833)
Three Generations of Computer • 1951-1958 first generation (vacuum tubes)
Three Generations of Computer • 1959-1964 second generation computer (transistors)
Three Generations of Computer • 1965-1970 third generation computers (integrated circuits – ICs)
The Post War Boom • Johnny von Neuman (1945) • Alan Turing (1946) Enigma • 1951 UNIVAC (Universal Automatic Computer)
Modern Computers • 1965 Third generation computers • 1975 Fourth generation computers (Microcomputers) • Now Multimedia, artificial intelligence
The History of Computers The End