The First Computer Machine




Location within Philadelphia
Location S 33rd St., S of Walnut St.
Coordinates 39.9522°N 75.1901°W
PA marker dedicated Thursday, June 15, 2000



Glen Beck (background) and Betty Snyder (foreground) program ENIAC in BRL building 328. (U.S. Army photo)

Programmers Betty Jean Jennings (left) and Fran Bilas (right) operate ENIAC's main control panel at the Moore School of Electrical Engineering. (U.S. Army photo from the archives of the ARL Technical Library)
ENIAC (/ˈini.æk/ or /ˈɛni.æk/; Electronic Numerical Integrator And Computer)[1][2] was the first electronic general-purpose computer. It was Turing-complete, digital, and capable of being reprogrammed to solve "a large class of numerical problems." [3][4]

Though ENIAC was designed and primarily used to calculate artillery firing tables for the United States Army's Ballistic Research Laboratory,[5][6] its first programs included a study of the feasibility of the thermonuclear weapon.[7]

When ENIAC was announced in 1946, it was heralded in the press as a "Giant Brain." [8] It had a speed on the order of one thousand (103) times faster than that of electro-mechanical machines; this computational power, coupled with general-purpose programmability, excited scientists and industrialists alike.

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