Eckert–Mauchly Computer Corporation

Before founding Eckert–Mauchly Computer Corporation, Mauchly researched the computing needs of potential clients. Over a period of six months in 1944 he prepared memos and kept detailed notes of his conversations. For instance, Mauchly met with United States Census Bureau official William Madow to discuss the computing equipment they desired. The Census Bureau was particularly keen on reducing the number of punch cards it had to manage with each census. This meeting led to Madow making a trip to see ENIAC in person. Mauchly also met with Lt. Colonel Solomon Kullback, an official at the Army Signal Corps, to discuss codes and ciphers. Kullback said there was a need for many "faster and more flexible" computers at his agency. Mauchly responded by carefully analyzing EDVAC's potential encryption and decryption abilities. Eckert and Mauchly thus believed there was strong government demand for their future products.

By the spring of 1946, Eckert and Mauchly had procured a U.S. Army contract for the University of Pennsylvania and were already designing the EDVAC – the successor machine to the ENIAC – at the university's Moore School of Electrical Engineering. However, new university policies that would have forced Eckert and Mauchly to sign over intellectual property rights for their inventions led to their resignation, which caused a lengthy delay in the EDVAC design efforts. After seeking to join IBM and John von Neumann's team at the Institute for Advanced Study in Princeton, New Jersey, they decided to start their own company, the Electronic Controls Corporation, in an office at 1215 Walnut St. in Philadelphia, Pennsylvania.