The KDF.9 computer system
A. C. D. Haley · 1962
The English Electric KDF.9 computing system has a number of unusual features whose origins are to be found in certain decisions reached at an early stage in the planning of the system. At this time (1958--59) simplified and automatic programming procedures were becoming established as desirable for all programming purposes, whereas previously they had been regarded as appropriate only to rapid programming of "one-off" problems because of the drastic reductions of machine efficiency which seemed inevitable.