Commercial Architecture (702/705/7080)
The IBM 702 and IBM 705 were similar and the 705 could run many 702 programs without modification, but they were not completely compatible.
The IBM 7080 was a transistorized version of the 705, with various improvements. For backward compatibility it could be run in 705 I mode, 705 II mode, 705 III mode, or full 7080 mode.
Read more about this topic: IBM 700/7000 Series
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—J.G. (James Graham)
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