Harwell computer
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The Harwell computer, or Harwell Dekatron computer, later known as the Wolverhampton Instrument for Teaching Computing from Harwell, is an early British computer of the 1950s based on valves and relays. From 2009 to 2012, it was restored at the... Wikipedia
Also known as: Wolverhampton Instrument for Teaching Computing from Harwell (WITCH)
Developer: Atomic Energy Research Establishment in Harwell, Berkshire
Display: Either a Creed teleprinter or a paper tape punch
Memory: 20 (later 40) eight-digit dekatron registers
Power: 1.5 kW