High Quality Content by WIKIPEDIA articles! CALDIC (the California Digital Computer) was an electronic digital computer built with the assistance of the Office of Naval Research at the University of California, Berkeley between 1951 and 1955 to assist and enhance research being conducted at the university with a platform for high-speed computing. CALDIC was designed to be constructed at a low cost and simple to operate. It was a serial decimal machine with an 8-inch diameter, 10,0000 word magnetic drum memory. (As CALDIC's decimal words were 10 digits each, the magnetic memory could store about 400,000 bits.) It contained 1300 vacuum tubes, 1000 crystal diodes, 100 magnetic elements (for the recording heads), and 12 relays (in the power supply). It was capable of speeds of 50 iterations per second. CALDIC was a stored program computer with a 6-digit instruction format (2 digits for the opcode and 4 digits for the memory address).

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