CDC 6600 cordwood module

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Date Introduced
1964
Photographer
Richards, Mark
Dimensions
overall: 7/8 in x 3 1/2 in x 3 1/2 in
Manufacturer
Control Data Corporation
Credit Line
Gift of control Data Corporation
Copyright Owner
© Mark Richards
Keywords
cordwood; packaging; cooling; CDC 6600 (Computer)
Object ID
X402.84A

Before integrated circuits, "cordwood" modules let engineers pack components into small spaces, increasing speed by keeping wires shorter. Seymour Cray's early computers all used this construction. In the 6600, metal plates in contact with circulating Freon™ cooled the cordwood modules.