IBM Card-Programmed Calculator

The International Business Machines (IBM) Card-Programmed Electronic Calculator (CPC) demonstrates the advantages to be gained from constructing a large calculator of proved, mass-produced units; from utilizing a pluggable control panel for flexibility; from input and output via standard media; from external programming for an intermediate sgeed machine; from a measure of parallel operation; and from line-printing output operating simultaneously with computing. The authors describe the arithmetic unit with its pluggable control panel, the storage units and their interconnections, timing, and overall operation of the CPC, sequencing, parallel operations and output.