Photograph of a computer diagram entitled "PPU to CPU / 6600 (Assembly & Disassembly / processor (12 to 60 bit words)". The diagram relates to the CDC 6600 computer which was manufactured by Control Data Corporation and came into use in 1964.

This is one of a set of photographs showing computers, computer components, computer structure diagrams and computer programmimg instructions, probably used as aids in teaching computing subjects. The diagrams and instructions relate to several pioneer models and systems of stored program computers dating back as far as the 1950s and including CSIRAC (originally known as CSIR Mark 1), Cirrus, Atlas, IBM System/360 , CDC 6600 System, and Illiac IV.

Description of Content

Block diagram showing a data flow chart from the Pulse Processing Unit [PPU] to the Central Processing Unit [CPU] of the CDC 6600 supercomputer.

Physical Description

Black and white photographic print of a computing block diagram.

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