1 History of Computers Source – IEEE 50 th anniversary of modern computing timeline Up to 50...
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Transcript of 1 History of Computers Source – IEEE 50 th anniversary of modern computing timeline Up to 50...
1
History of Computers• Source – IEEE 50th anniversary of modern
computing timeline• http://www.computer.org/history/development/index.html
• Up to 50 years ago
2
History of Computing
• 1612 – John Napier made the first
printed use of the decimal point
• 1622– William Oughtred created
the slide rule (originally circular) based on Napier's logarithms that was to be the primary calculator of engineers through the 19th and early 20th centuries.
3
1642• Blaise Pascal created
an adding machine with automatic carries from one position to the next.
4
1822• Charles Babbage
– design the Difference Engine for computing the entries in navigation and other tables.
• Users did not have to understand underlying algorithm
5
1833• Babbage realizes difference engine is
special purpose
• Begins work on Analytic Engine – Has basic components of a modern computer
• BUT– Did not document well– Ideas unaccepted due to lack of
communication
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1935-1938• Conrad Zuse
– developed his Z-1 computer in his parent's living room, a relay computer, using binary arithmetic.
• Didn’t get funding.
7
1943• John Mauchly and J.
Presper Eckert
• Worked on ENIAC at Penn– Electronic Numerical
Integrator and Calculator
• First general purpose computer
8
1944• Harvard Mark I
• First large scale, automatic, general purpose, electromechanical calculator
• Same purpose as Babbage’s machine
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ENIAC• Eckert on left
and Goldstine (army liason) on right, holding an arithmetic unit from the ENIAC
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ENIAC• Eckert and Mauchly
• represented a stepping stone towards the true computer
• not the ultimate in the state-of-the-art technology
• BUT … construction was completed
• programmed by rewiring interconnections
12
1948• EDSAC
– Electronic Delay Storage Automatic Computer
• Stored program computer
• Four others being built at the same time
13
von Neumann• Von Neumann, Burks,
and Goldstine wrote memos/drafts on the first logical design of computers
• Didn’t credit Mauchly and Eckert
• Basic architecture is still widely used 50 years later