1940s computers

Early British cryptanalysis computer

first working programmable, fully automatic digital computer

early American computer

thumb|275px|The EDVAC as installed in Building 328 at the Ballistic Research Laboratory EDVAC (Electronic Discrete Variable Automatic Computer) was one of the earliest electronic computers. It was built by Moore School of Electrical Engineering at the University of Pennsylvania in the United States. Along with ORDVAC, it was a successor to the ENIAC. Unlike ENIAC, it was binary rather than decimal, and was designed to be a stored-program computer.

The Electronic Delay Storage Automatic Calculator (EDSAC) was an early British computer. Inspired by John von Neumann's seminal First Draft of a Report on the EDVAC, the machine was constructed by Maurice Wilkes and his team at the University of Cambridge Mathematical Laboratory in England to provide a service to the university. EDSAC was the second electronic digital stored-program computer, after the Manchester Mark 1, to go into regular service.

first electronic stored-program computer

early electronic digital computing device

English stored-program computer, 1949

computer

vacuum tube computer

computer

British early electronic serial stored-program computer

fluidic analogue computer simulating the UK ecomomy

BINAC (Binary Automatic Computer) is an early electronic computer that was designed for Northrop Aircraft Company by the Eckert–Mauchly Computer Corporation (EMCC) in 1949. Eckert and Mauchly had started the design of EDVAC at the University of Pennsylvania, but chose to leave and start EMCC, the first computer company in the United States. BINAC was their first product, the first stored-program computer in the United States; BINAC is also sometimes claimed to be the world's first commercial digital computer even though it was limited in scope and never fully functional after delivery.

IBM Selective Sequence Electronic Calculator

CSIRAC (; Commonwealth Scientific and Industrial Research Automatic Computer), originally known as CSIR Mk 1, was Australia's first digital computer, and the fifth stored-program computer in the world. It is the oldest surviving first-generation electronic computer (the Zuse Z4 at the Deutsches Museum is older, but was electro-mechanical, not electronic). It was the first computer to play digital music.

electromechanical computer at Harvard University, completed in 1947

digital computer