Cray stuffed an incredible 60 miles of wire into his Cray-1 machine. Part of the reason for the machine's cylindrical design was to reduce each wire's length to just 3 inches to minimize signal delays.
A Cray-2 488 MFLOPS/CPU with a memory of 512MW, seen here on display at the Computer History Museum in Mountain View, California. Released in 1985, each of the 27 machines made cost between $12 million and $20 million.
In 1980, "wiring ladies" working on the Cray-1 would've worn this simple smock as they spent months inside the machines under production weaving together miles of wire to form these newest supercomputers.