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Wang 720 Series Calculators

Technology Machine Log Wang Data Pages

The Wang 720 is essentially the same as the 700 but with double the RAM, to 16k bits of core. This provides 248 storage registers, or 1984 program steps.

The featured machine is a 720A serial 870019 with manufacturing date stamps from September 1970.

As with the 700, three microcode versions were available:

720A does not support 702 plotter, binary decisions or Learn+Run mode
720B adds support for 702 plotter output
720C adds binary decisions, Learn+Run mode, block I/O transfers

Except for larger core RAM, the 720A and -B have the same hardware as their 700 series siblings. A and B models differ only in microcode ROM. The 720C has three circuit boards specific to the -C model as well as specific microcode.

See the 700 series entry for more detailed information. The 720 machines differ from their 700 series counterparts only in RAM capacity, so the descriptions and information in the 700 section are applicable to the 720 machines.