IBM Announces Model 705 Computer

1st October 1954
IBM Announces Model 705 Computer

The IBM 705 was a first generation tube based computer. It was announced October, 1954, with deliveries in 1956. It was a character oriented machine, with 7 bit characters and 35 bit words (to fit 5 characters). 705 Model I came with storage for 20,000 characters and cost around $590,000. (1954 dollars, which is over 4 million in 2003 dollars). Model II came with 40,000 characters of storage and Model III had a whopping 80,000 characters of storage.

The 705 was the first commercial computer with core memory. The IBM 704 (announced in 1954) also had core memory, but was generally regarded as a scientific computer. The 705 succeeded the IBM 702, which used CRT memory. The arithmetic unit alone used 1,700 vacuum tubes. It could multiple two 10 digit numbers in only .0024 seconds.

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IBM Announces Model 705 Computer

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