The Programme-Controlled Computer. A digital computer for commercial applications

The Programme-Controlled Computer (P.C.C.), which has been designed for commercial work, is described. The programme instructions are not entered into the computing store, but are set up on switches preparatory to a computation taking place. The control is such that immediate access is available to each instruction, and that transfer of control and modification of address are possible. Storage of immediate access and of slow access is provided on a magnetic drum. Numbers are represented throughout the computer in sterling or decimal form. Input and output are by means of punched cards, flexibility being provided by plugboards.