In April of 1971, NCAR's Scientific Computing Division (SCD) was preparing to receive a Control Data Corporation 7600. This image shows construction in the computer area. Delivered in May, the CDC 7600 had a small-core memory of 65,536 60-bit words and a clock speed of 27 nanoseconds. It generally ran at five times the speed of the CDC 6600. This represented the last time that large a general increase of speed was available from a single processor. The CDC 7600 was replaced in 1983 by a used CRAY-1A.
