ENIAC-Electronic Numerical Integrator And Computer was the first electronic general-purposecomputer. It was Turing-complete, digital, and could solve "a large class of numerical problems" through reprogramming.

Although ENIAC was designed and primarily used to calculateartillery firing tables for the United States Army's Ballistic Research Laboratory,its first programs included a study of the feasibility of the thermonuclear weapon.

ENIAC was formally dedicated at the University of Pennsylvania on February 15, 1946 and was heralded as a "Giant Brain" by the press.^[8] It had a speed on the order of one thousand (10³) times faster than that of electro-mechanicalmachines; this computational power, coupled with general-purpose programmability, excited scientists and industrialists alike. This combination of speed and programmability allowed for thousands more calculations for problems, as ENIAC calculated a trajectory that took a human 20 hours in 30 seconds (a 2400x increase in speed).