page_title: Harwell computer
hierarchical_section_title: Harwell computer
caption_attribution_description: English: Harwell Dekatron Computer - early UK relay computer
context_page_description: The Harwell computer, later known as the Wolverhampton Instrument for Teaching Computing from Harwell, or the Harwell Dekatron Computer, is an early British relay-based computer of the 1950s. From 2009 to 2012, it was restored at the National Museum of Computing. In 2013, for the second time, the Guinness Book of World Records recognised it as the world's oldest working digital computer, following its restoration. It previously held the title for several years until it was decommissioned in 1973. The museum uses the computer's visual, dekatron-based memory to teach schoolchildren about computers.
context_section_description: The Harwell computer, later known as the Wolverhampton Instrument for Teaching Computing from Harwell (WITCH), or the Harwell Dekatron Computer, is an early British relay-based computer of the 1950s. From 2009 to 2012, it was restored at the National Museum of Computing. In 2013, for the second time, the Guinness Book of World Records recognised it as the world's oldest working digital computer, following its restoration. It previously held the title for several years until it was decommissioned in 1973. The museum uses the computer's visual, dekatron-based memory to teach schoolchildren about computers.
caption: The Harwell Dekatron Computer
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