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... Throughout history computers have affected everything. From international commerce
to international security computers make everything simpler. ...
History of Computers. The definition of a computer has changed over time. ... Works
Cited Bellis, Mary. “The History of Computers.” 15 October 2004. ...
History of Computers. ... Ormand Beach: Camelot Publishing Company, 1996. Rusch, Richard
Computers: Their History and How They Work. New York: Simon & Schuster. ...
The History Of Computers. THE HISTORY OF COMPUTERS In 500 BC the abacus was
first used by the Babylonians as an aid to simple arithmetic. ...
The History Of Computers. THE HISTORY OF COMPUTERS In 500 BC the abacus was
first used by the Babylonians as an aid to simple arithmetic. ...
Submitted by cmiller226 on May 19, 2005
Category: Science
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Chris Miller
Ms. Rozanski
English III
May 20, 2005
History of the Computer
The ENIAC (Electronic Numerical Integrator and Computer) was the first large-scale, computer. The ENIAC was built for the military to calculate the paths of artillery shells. Later on it was used to make calculation for nuclear weapons research, weather predictions, and wind tunnel design. “The ENIAC was brought in to use inn February of 1946 and was used unit October 1955” (Encarta).
The creators of the ENIAC were American physicist John W. Mauchly and American Electrical engineer John Persper Eckert, Jr. at Moore School of Electrical Engineering at the University of Pennsylvania. Eckert and Mauchly demonstrated the ENIAC less than three years after the Army commissioned its construction. In 1947 the ENIAC moved from the University of Pennsylvania to its permanent home at the Aberdeen Proving ground in Maryland. “Only one system of its type was ever built, but operated continuously until October 1955” (Encarta).
The ENIAC was very different than modern day computers, which use microprocessors composed of thousands or millions of transistors; the ENIAC used vacuum tubes to process data. It had approximately 18,000 vacuum tubes, which were about the size of a small light bulb. The ENIAC was composed of 30 separate units with power supplies and cooling units; all together the whole unit weighed more than 30 tons, and took up 1800 sq. ft. and consumed 175Kw of power.
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The ENIAC could perform about 5000 calculations per second, more than 10,000 times slower that most modern day computers. The ENIAC took about 20 seconds to calculate problems that took humans two to three days to do manually. Initially, scientists programmed and entered data into ENIAC by manually setting switches and rewiring the machine. Later a more efficient IBM punch-card reading machine was used to input data,...
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