MUSASINO-1

The MUSASINO-1 was one of the earliest electronic digital computers built in Japan.Construction started at the Electrical Communication Laboratories of NTT at Musashino, Tokyo in 1952 and was completed in July 1957.Saburo Muroga, a University of Illinois visiting scholar and member of the ILLIAC I team, returned to Japan and oversaw the construction of MUSASINO-1.Using 519 vacuum tubes and 5,400 parametrons,[1] the MUSASINO-1 possessed a magnetic core memory, initially of 32 (later expanded to 256) words.However, many of the programs for the ILLIAC used some of the unused bits in the instructions to store data, and these would be interpreted as a different instructions by the MUSASINO-1 control circuitry.
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