UNIVAC I - Universal Accounting Computer

UNIVAC – I (Universal Accounting Computer)

The Universal Automatic Computer-I was the first commercial computer produced in the United State. It was designed principally by J. Presper Eckert and John William Mauchly in 1951. The First UNIVAC was delivered to the United States Census Bureau on March 31 1951. It was the first general purpose electronic digital computer. It used magnetic tape for data input and output. This computer used 5200 vacuum tubes to process data.

The machine was 25 feet by height 50 feet length, contained 5600 vacuum tubes 18000 crystical diodes and 300 relays. It utilized serial circuitry, 2.25 MHz bit rate, and had an internal storage capacity 1000 words or 12000 characters.

Power consumption was about 120 Kva. It's reported processing speed was 0.525 milliseconds for arithmetic functions 2.15 millisecond for multiplication and 3.9 milliseconds for divisions.

The UNIVAC was also the first computer to come equipped with a magnetic tape unit and was the first computer to use buffer memory.
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