Whirlwind I

Whirlwind I was a Cold War-era vacuum tube computer developed by the MIT Servomechanisms Laboratory for the U.S. Navy. Operational in 1951, it was among the first digital electronic computers that operated in real-time for output, and the first that was not simply an electronic replacement of older mechanical systems.

Whirlwind I
Whirlwind computer elements: core memory (left) and operator console
Product family"Whirlwind Program"/"Whirlwind Project"
Generation1st
Release dateApril 20, 1951 (1951-04-20)
CPU16 bits, parallel. Uses about 5000 vacuum tubes
MemoryCore memory, 1 kiloword of 16 bits words (2 kilobytes). Ultimately 2048 words (4KB).
PowerMore than 100 kW
Dimensions2,000 sq.ft (185 m2)
Mass20,000 lbs (9.1t)
SuccessorTX-0, TX-2, DEC PDP-1

It was one of the first computers to calculate in bit-parallel (rather than bit-serial), and was the first to use magnetic-core memory.

Its development led directly to the Whirlwind II design used as the basis for the United States Air Force SAGE air defense system, and indirectly to almost all business computers and minicomputers in the 1960s, particularly because of the mantra "short word length, speed, people."

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