Bram Loopstra

Bram Jan Loopstra (1925 to 1979) was a Dutch computing pioneer and an early builder of computers in the Netherlands. He worked at the Mathematisch Centrum in Amsterdam, where he contributed to the ARRA I and II machines and to the ARMAC, and then at Electrologica, a computer company, alongside Adriaan van Wijngaarden, Carel S. Scholten and Gerrit Blaauw. From 1956 until at least 1963 he was technical director of Electrologica. His writings include a 1952 report on the logical synthesis of calculating circuits and a 1959 paper describing the X1 computer, together with a paper on input and output in the X1 system. At his death on March 22, 1979, after a long illness, he was adjunct director of the Philips International Institute.