Walther WSR-16 mechanical calculator. The row of digit-wheels in the carriage (at the front), is the Accumulator.
A Nova system (beige and yellow, center bottom) and a cartridge hard disk system (opened, below Nova) in a mostly empty rack mount.
Front panel of an IBM 701 computer with lights displaying the accumulator and other registers
Data General Nova 1200 front panel
A Nova 1200, mid-right, processed the images generated by the EMI-Scanner, the world's first commercially available CT scanner.
Nova 1200 CPU printed circuit board. The 74181 ALU is the large IC center-right.
Running Nova 840 (The front panel has been replaced with one from a 1220)
Data General Nova 3
Data General mN601 microprocessor
Data General software on punched tape

As the complexity of a flip-flop was being rapidly reduced as they were implemented in chips, the design offset the lack of addressing modes of the load/store design by adding four general-purpose accumulators, instead of the single register that would be found in similar low-cost offerings like the PDP series.

- Data General Nova

The HP 2100 and Data General Nova had 2 and 4 accumulators.

- Accumulator (computing)
Walther WSR-16 mechanical calculator. The row of digit-wheels in the carriage (at the front), is the Accumulator.

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