Ferranti Pegasus Dead
Ferranti Pegasus
KindMachine
Introduced1956
Discontinued1962
StatusDead
ManufacturerFerranti
ClassMainframe
PlatformValves, drum
Sourcebitsavers.org ↗
Britain's valve-era workhorse — notable today because a 1959 Pegasus still runs: the oldest working computer in the world, booted regularly at London's Science Museum.
1960198020002020
Created by Ferranti
Ferranti built 38 Pegasus machines — valve-driven, drum-memory computers with a distinctive console — for British industry from 1956. The last ran until the early 1970s.
The Science Museum's 1959 Pegasus is maintained in working order and periodically operated — currently the oldest functional computer anywhere. Visitors can watch it run programs on a teleprinter.