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Computer generations
- Essay length: 1171 words
- Submitted: 05/03/2009
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3 ALTERNATIVE APPROACHES TO THE HISTORY OF COMPUTERS
Jules Cassidy
Lecture Structure
1) Computer generations
2) Software approach
3) Friedman's computer systems
development model
4) Conclusion
First Generation Systems 1943 - 1955
* ENIAC (Electronic Numerical Integrator And Computer)
* 18,000 vacuum tubes or valves
* Designed by J.W.Mauchly & J.P.Eckert, University of Pennsylvania for US military during WW2 to calculate firing tables
* Big & hot
* UNIVAC - Remington Rand, first 'commercial' computer
1. Computer generations
First Generation Systems 1943 - 1955
* ENIAC (Electronic Numerical Integrator And Computer)
* 18,000 vacuum tubes or valves
* Designed by J.W.Mauchly & J.P.Eckert, University of Pennsylvania for US military during WW2 to calculate firing tables
* Big & hot
* UNIVAC - Remington Rand, first 'commercial' computer
Second Generation Systems 1956 - 1964
* Transistors (developed in AT&T's Bell Lab) replaced vacuum tubes
* Brattain, Shockley & Bardeen
* Faster, cheaper, smaller, more reliable
* IBM 1401
Third Generation Systems 1964 -1980
* Integrated
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