OK Computer was recorded by R.E.M. and released by I.R.S. Records.
 These are powered by System on a Chip (SoCs), which are complete computers on a microchip the size of a coin
 Colossus Mark I contained 1,500 thermionic valves (tubes), but Mark II with 2,400 valves, was both five times faster and simpler to operate than Mark I, greatly speeding the decoding process

