Architectures
The IBM 700/7000 series had six completely different ways of storing data and instructions:
- First (36/18-bit words): 701 (Defense Calculator)
- Scientific (36-bit words): 704, 709, 7090, 7094, 7040, 7044
- Commercial (variable length character strings): 702, 705, 7080
- 1400 series (variable length character strings): 7010
- Decimal (10 digit words): 7070, 7072, 7074
- Supercomputer (64-bit words): 7030 "Stretch"
The 700 class used vacuum tubes, the 7000 class was transistorized. All machines (like most other computers of the time) used magnetic core memory; except for early 701 and 702 models, which used CRT memory.
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