Mauchly earned physics PhD from Johns Hopkins in 1932. Mauchly met Eckert at University of Pennsylvania in 1941. Army contracted Moore School in 1943 for ENIAC to compute artillery firing tables. ENIAC performed 5000 additions or 357 multiplications per second. ENIAC thousand times faster than prior technology. ENIAC programmed via patch cords and switches initially. Mauchly and Eckert planned EDVAC with stored programs in 1944. Von Neumann's EDVAC report omitted credit to Mauchly and Eckert. Eckert-Mauchly Corporation founded in 1947 as first computer company. Corporation built BINAC and UNIVAC I, first US commercial computer. Mauchly created Short Code, first used programming language in 1949. ENIAC patent invalidated in 1973 due to prior disclosure and Atanasoff-Berry computer. Mauchly developed Critical Path Method for construction scheduling. Mauchly of German descent but did not speak German. Mauchly married ENIAC programmer Kay McNulty in 1948.