ENIACENIAC

Basic FactsBasic Facts The Electronic Numerical The Electronic Numerical

Integrator and Computer Integrator and Computer (ENIAC) was first announced (ENIAC) was first announced on February 14, 1946.on February 14, 1946.

It was the first general-purpose It was the first general-purpose electronic computer. electronic computer.

It was constructed and It was constructed and operated at the Moore School operated at the Moore School of Electrical Engineering. of Electrical Engineering.

It was built by John Mauchly It was built by John Mauchly and J. Presper Eckert.and J. Presper Eckert.

It was a war project from WWll It was a war project from WWll its mathematical calculations its mathematical calculations needed to produce artillery needed to produce artillery firing tables for the Army.firing tables for the Army.

Building the ENIACBuilding the ENIAC

Many inventions led to the Many inventions led to the development of the ENIAC.development of the ENIAC.

The mechanical brains, The mechanical brains, abacus, slide rule, difference abacus, slide rule, difference engine, mechanical calculators, engine, mechanical calculators, differential analyzer, vacuum differential analyzer, vacuum tubes and punch cards all tubes and punch cards all contributed to ENIAC.contributed to ENIAC.

ENIAC was 150 feet wide with ENIAC was 150 feet wide with 20 banks of flashing lights.20 banks of flashing lights.

It weighed 40 tons.It weighed 40 tons.

It had 40 panels of plugboards It had 40 panels of plugboards in a U shape.in a U shape.

It had 18, 000 vacuum tubes.It had 18, 000 vacuum tubes. It contained thousands of It contained thousands of

circuits.circuits. It used 150 kilowatts of It used 150 kilowatts of

electricity. electricity. The internal memory was The internal memory was

composed of twenty ten digit composed of twenty ten digit accumulators and 6, 000 accumulators and 6, 000 cables and switches on the cables and switches on the function table. function table.

The external memory was The external memory was supplied by punch cards. supplied by punch cards.

Works CitedWorks Cited

"Penn Engineering - ENIAC: Celebrating Penn Engineering History." "Penn Engineering - ENIAC: Celebrating Penn Engineering History." Penn Engineering - Welcome to the School of Engineering and Penn Engineering - Welcome to the School of Engineering and Applied Science (SEAS)Applied Science (SEAS). N.p., n.d. Web. 11 Sept. 2013. . N.p., n.d. Web. 11 Sept. 2013. <http://www.seas.upenn.edu/about-seas/eniac/history.php>. <http://www.seas.upenn.edu/about-seas/eniac/history.php>.

Cruz, Frank da. “Programming the ENIAC.” Colombia University Cruz, Frank da. “Programming the ENIAC.” Colombia University Computing History. Apr.2012. Web. 11 Sept. 2013Computing History. Apr.2012. Web. 11 Sept. 2013