ENIAC did not originally contain an internal store. However, during construction, the idea was discussed and was added later. Although ENIAC best performed the job it had been designed to do, calculate ballistic tables, it was used for many other types of scientific problems such as weather prediction, atomic energy calculations, cosmic ray studies, thermal ignition, random-number studies and wind-tunnel design.

By 1945, three major lines of development -- logical automata, statistical machines, and calculating machines had come together to form the electronic computer.

One more insight was needed to bring together the modern computer.

In 1944, the army asked the Moore School to build a more powerful computer than the ENIAC.