Bram Jan Loopstra
Bram Jan Loopstra (1925 – 1979) was a Dutch computing pioneer who worked at the Mathematisch Centrum, Amsterdam and then at Electrologica with Adriaan van Wijngaarden, Carel S. Scholten and Gerrit Blaauw. From 1956 until at least 1963 he was technical director of Electrologica. At his death after a long illness on March 22, 1979, he was adjunct director of the Philips International Institute.
- 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.
- Amsterdam Archive Cards
- Obituary in Nieuwe Leidsche Courant, 23 March 1979.
- Unsung Heroes in Dutch Computing History — Carel S. Scholten and Bram Jan Loopstra — Illustrated report of his work at the TU Eindhoven
- Baayen, P. C., and J. Nuis. "In Memoriam A. van Wijngaarden 1916-1987 Archived 2014-10-11 at the Wayback Machine."
- Nederlands eerste computerindustrie: van Electrologica tot Philips-Electrologica (in Dutch)