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The SEA CAB 500 Computer
January-March 1990 (vol. 12 no. 1)
pp. 23-29

The CAB 500 was planned by SEA as a low cost, simple to use computer, primarily for scientific calculations. The technology used was magnetic amplifiers, transistors, ferrite cores, and a magnetic drum, with input/output on perforated paper tape. It could be used in two modes: as a stored program computer or as a desk calculator. It was a micro-programmed machine, and a high-level language PAF (Programmation Automatique des Formules) was developed for it. It was launched in 1960 and over 100 were sold.

1. Becquet, F., and Recoque, A. 1959. "CAB 500: Petite calculatrice arithmétique."Chiffres 2.
2. Dumaire, M. 1960. "Le Symmag, organe de commutation statique magnétiqueàhaute rapidité"L'Onde Electrique 403, p. 657.
3. Raymond, F. H. 1960. "Présentation de deux calculatrices SEA."L'Onde Electrique 405, p. 920.
4. Starynkévitch, D. 1960 March&April. Internal SEA technical notes, describing CAB 500 and PAF--in French
5. Starynkévitch, D. 1988. "Un langage de la SEA. La programmation sur CAB 500. PAF: Programmation Automatique des Formules." InActes du Colloque sur l'Histoire de l'Informatique en France, Grenoble, Philippe Chatelin-INPG
6. SEA CAB 500. Commercial Brochure "The Symmag element: a new magnetic high-speed switching element--its applications to machine tool numerical positioning control." InProceedings of a Special Technical Conference on Non-linear Magnetics and Magnetic Amplifiers. October 26-28 1960 Philadelphia, PA.
7. List of SEA U.S.A. patents, 1950-1967. The Symmag magnetic technique was described in the following US patents: No. 711,448 27 January 1958 (Raymond, Recoque, Richard), 750,226 22 July 1958 (Masson), 760,716 12 September 1958 (Richard), and also in patents taken out in Britain, France, Germany, Italy, Japan, and Sweden.

Dimitri Starynkevitch, "The SEA CAB 500 Computer," IEEE Annals of the History of Computing, vol. 12, no. 1, pp. 23-29, Jan.-March 1990, doi:10.1109/MAHC.1990.10008
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