This US-built ENIAC [36] (Electronic Numerical Integrator and Computer) was the first electronic programmable computer built the united states. Although the ENIAC was similar to the Colossus it was much quicker and more flexible. It was unambiguously a Turing-complete device and may even compute any problem that would fit into its memory. Such as Colossus, a "program" on the ENIAC was defined by this states of its patch cables and switches, a far cry on the stored program electronic machines that came later. Once a software program was written, it had to be mechanically set into the appliance with manual resetting of plugs and switches.
It combined the high speed of electronics web site be programmed for many complex problems. It could add or subtract 5000 times a 2nd, a thousand times faster than any other machine. It likewise had modules to multiply, divide, and square root. High speed memory was on a 20 words (about 80 bytes). Built under this direction of John Mauchly and J. Presper Eckert for the University of Pennsylvania, ENIAC's development and construction lasted from 1943 to full operation right at the end of 1945. The machine was huge, weighing 30 tons, using 200 kilowatts of energy and contained over 18, 000 vacuum tubes, 1, 500 relays, and tons of resistors, capacitors, and inductors.