The first general-purpose electronic computer was a turing-complete digital computer known as ENIAC or Electronic Numerical Integrator And Computer was invented by John Presper Eckert and John Mauchly at the University of Pennsylvania. The construction of ENIAC began in 1943 and last until 1946. ENIAC measured around 8x3x100 feet had 1,500 relays, 7,200 crystal diodes, 17,468 vacuum tubes, 10,000 capacitors, 7 0,000 resistors, and 5 million hand-soldered joints, and consumed 150 KW of power. Its speed was a thousand times than other electro-mechanical machines. It was designed for the purpose of calculating artillery firing tables for the US Army’s Ballistic Research Laboratory and was programmed to solve different computing problems.