IBM 709

<computer>

A computer made by IBM oriented toward scientific work. The 709 had the same basic architecture as the IBM 704 but with many I/O and performance refinements over the 704.

The IBM 709 (like the 704) had 36-bit memory words, 15-bit addresses and instructions with one address. A few index register instructions had the infamous 15-bit decrement field in addition to the 15-bit address.

The IBM 7090 was a transistorised version of the 709.

[Difference between 704 and 709?]

Last updated: 1999-01-19

Nearby terms:

IBM 704IBM 7040IBM 705IBM 709IBM 7090IBM 7094IBM 801IBM compatible

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