ENIAC or the electronic numeric integrator and computer was the first general purpose electronic computer. The general part of the label depended on its programmability ̵
Although the design process for the machine began in 1943, the end product only became a formal demonstration of its capabilities on February 14, 1946. The demonstration made quite an impression and was viewed by the press and the public as a huge brain and a miracle of design considered.
ENIAC would prove to be extremely influential for military development and operations in which it was used to compute artillery fire tables and, more famous, to provide figures for the Manhattan Project. Despite the program sponsored by the Ballistic Research Laboratory (and thus the interest in using computers for artillery tables), the well-known hydrogen bomb researcher John von Neumann used the computer as soon as he became aware of his abilities. The first calculations performed on the machine concerned the hydrogen bomb, and the entire input / output of the operation consisted of an astonishing million punch cards.