A Brief History of Computers
125 BC: The Antikythera Mechanism
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1100: The Torquetum
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1206: Clock Tower
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1614: Napier’s Bones
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1671: The 'Stepped Reckoner'
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1823 – Difference Engine
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1833 – Analytical Engine
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1890: Punched Card
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1942: Atanasoff – Berry Computer
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1944: Harvard Mark-I
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1944: Colossus
1946: ENIAC (Electronic Numerical Integrator And Computer)
5,000 operations per second - 1,000 square feet of floor space
Designed to calculate artillery firing tables for the Army
1948: SSEM or 'Baby'
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May 6, 1949: EDSAC
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1951: Whirlwind
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1951: UNIVAC – 1st Commercial Computer
1,905 operations per second
Cost: $750,000 + $185,000 for printer
End of Class!!
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