An engineer wiring an early IBM computer.1958

The IBM Semi-Automatic Ground Environment (SAGE) computer system, brought online in 1958 to direct the US radar and missile defense network. Consisting of 20 separate mammoth computer installations, each using 60,000 vacuum tubes housed in a 1 acre building, SAGE was easily the largest and most complex computer in the world.

Need an ashtray? The SAGE has you covered.

It's a beautiful piece of kit.

IBM System/370 with color terminal at NASA in 1983.