Royal Society Publishing

An Assessment of the System of Optimum Coding Used on the Pilot Automatic Computing Engine at the National Physical Laboratory

J. H. Wilkinson


The paper describes the system of optimum coding which is used on the Pilot ACE, the electronic computer at the National Physical Laboratory. It includes a number of simple examples of programs prepared for the machine and gives an assessment of the gain in speed which results from the use of optimum coding in general. It concludes with a description of the design of the full-scale ACE which takes full advantage of the general principles embodied in the design of the Pilot ACE.