IBM's electronic (vacuum tube) calculators could perform multiple calulations, including division.

The card-programmed calculators used fields on punched cards not to specify the actual operations to be performed on data, but which "microprogram" hard-coded onto the plugboard of the IBM 604 or 605 calculator machine; a set of cards produced different results when used with different plugboards.

[1] The original CPC Calculator has the following units interconnected by cables: The CPC-II Calculator has the following units interconnected by cables:[1] From the IBM Archives:[2] The IBM Card-Programmed Electronic Calculator was announced in May 1949 as a versatile general purpose computer designed to perform any predetermined sequence of arithmetical operations coded on standard 80-column punched cards.

The Type 605 could be used as a Calculating Punch and the punch unit (Type 527) could be operated as an independent gang punch.Customer deliveries of the CPC began in late 1949, at which time more than 20 had been ordered by government agencies and laboratories and aircraft manufacturers.

Nearly 700 CPC systems were delivered during the first-half of the 1950s.This computer hardware article is a stub.