information:classification, structural:reformatting
Notable accumulator-based computers

The 1945 configuration of ENIAC had 20 accumulators, which could operate in parallel.: 46 Each one could store an eight decimal digit number and add to it (or subtract from it) a number it received.: 33 Most of IBM's early binary "scientific" 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 distributor and two ten-digit accumulators; the IBM 7070, a later, transistorized decimal machine had three accumulators. The IBM System/360, and Digital Equipment Corporation 's PDP-6, had 16 general-purpose registers, although the PDP-6 and its successor, the PDP-10, call them accumulators. The GE-600_series was a one-accumulator machine, notable for having eight powerful tagged address registers for accessing a second operand.