CHM Revolution

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.