Bram Jan Loopstra (1925 – 1979)Amsterdam Archive Cards was a Dutch computing pioneer who worked at the Mathematisch Centrum, AmsterdamUnsung Heroes in Dutch Computing History — Carel S. Scholten and Bram Jan Loopstra — Illustrated report of his work at the TU Eindhoven and then at Electrologica with Adriaan van Wijngaarden, Carel S. Scholten and Gerrit Blaauw.Baayen, P. C., and J. Nuis. "In Memoriam A. van Wijngaarden 1916-1987 ." From 1956 until at least 1963 he was technical director of Electrologica.Nederlands eerste computerindustrie: van Electrologica tot Philips-Electrologica At his death after a long illness on March 22, 1979, he was adjunct director of the Philips International Institute.Obituary in Nieuwe Leidsche Courant, 23 March 1979.
At the Mathematisch Centrum he contributed to the ARRA I and II and ARMAC.
Selected publications Loopstra, B. J. "Logische synthese van rekencircuits." Stichting Mathematisch Centrum. Zuivere Wiskunde ZW 10/52 (Actualiteiten) (1952): 1-7. Loopstra, B. J. "The X—1 Computer." The Computer Journal 2.1 (1959): 39-43. Loopstra, B. J. "Input and output in the X-1 system." COMMUNICATIONS OF THE ACM. Vol. 2. No. 7. 1959.
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