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The CAB500 was a French transistor-based drum computer, designed at SEA around 1957 by Alice Recoque.[1]

The computer had an incremental compiler for a language, PAF (Programmation Automatique des Formules) similar to Fortran, designed by Dimitri Starynkevitch in 1957-1959. CAB 500's first model was delivered in February, 1961,[2] and more than a hundred exemplars were built. It had a magnetic drum memory of 16 K words (of 32 bits) rotating at 3000 rpm (50 rotations/s) and could invert a square matrix of order 25 in half an hour.


  1. ^ STARYNKEVITCH, Dimitri (1990). "The SEA CAB 500 Computer". IEEE Ann. Hist. Comput. IEEE Educational Activities Department. 12 (1). ISSN 1058-6180. 
  2. ^ CAB 500 (in French)