The ENIAC (Electronic Numerical Integrator and Computer) was the first general-purpose electronic computer used for solving numerical problems. It was invented by J. Presper Eckert and John Mauchly at the University of Pennsylvania as an effort to calculate artillery firing tables for the United States Army’s Ballistic Research Laboratory. The construction of this computer began in 1943 and was not completed until 1946. Though it was not completed until the end of the World War II, the ENIAC was created to help with the war effort against German forces. The ENIAC occupied about 1,800 square feet, used 17,468 vacuum tubes, 15,000 relays, and a teletype. It weighed almost 50 tons which use 200 kilowatts of electricity, and cost about $500,000.

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