For the record … text from JY’s homepage relating to the recent Three Witches exhibition: Exhibition – Three Witches.. Yeadon at 70 The National Museum of Computing at Bletchley Park brings together John Yeadon’s 1982 ‘Portrait of a Dead WITCH’ and his recent second version of this, the worlds oldest working computer, ‘It’s Alive. Harwell/Dekatron WITCH, 2017’. March 7th 2019: Please note that the exhibition period has been extended until the end of April. The latest NMOC Press Release can […]