Secondary Accumulator

Some articles on accumulator, accumulators:

Accumulator (computing) - Notable Accumulator-based Computers
... beginning with the vacuum tube IBM 701 in 1952, used a single 36-bit accumulator, along with a separate multiplier/quotient register to handle operations with longer results ... The IBM 650, a decimal machine, had one 10 digit accumulator the IBM 7070, a later, transistorized decimal machine had three accumulators ... was one of the first minicomputers to use accumulators, and inspired many later machines ...

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