was the first stored-program
computer built in Japan
. It was finished in March of 1956
, the project having been effectively started in 1949
, and was essentially built almost entirely by one person – Dr. Okazaki Bunji. Originally designed to perform calculations for lens design by Fuji
, the ultimate goal of FUJIC's construction was to achieve a speed 1,000 times that of human calculation for the same purpose – amazingly, the actual performance achieved was double that number.
Employing approximately 1,700 vacuum tubes, the computer's word length was 33 bits. It had an ultrasonic mercury delay 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 in Odawara, it was given later to Waseda University before taking up residence in the National Science Museum of Japan in Tokyo.
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