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FUJIC was the first electronic digitalcomputer in operation inJapan. It was finished in March 1956, the project having been effectively started in 1949, and was built almost entirely by Dr. Okazaki Bunji.[1] Originally designed to perform calculations for lens design byFuji, the ultimate goal of FUJIC's construction was to achieve a speed 1,000 times that of human calculation for the same purpose – the actual performance achieved was double that number.
Employing approximately 1,700vacuum tubes, the computer'sword length was 33 bits.[2] It had anultrasonic mercurydelay-line memory of 255 words, with an average access time of 500 microseconds. An addition or subtraction was clocked at 100 microseconds, multiplication at 1,600 microseconds, and division at 2,100 microseconds.
Used extensively for two years at the Fuji factory inOdawara, it was given later toWaseda University before taking up residence in theNational Science Museum of Japan inTokyo.
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