cently founded by Eduard Stiefel, where he worked together with Ambros Speiser on developing the first Swiss computer ERMETH, and developed the programming language Superplan (1949–1951), the name being a reference to Rechenplan (English: computation plan), in Konrad Zuse's terminology, designating a single Plankalkül program. He contributed especially in the field of compiler pioneering work and was eventually involved in defining the languages ALGOL 58 and ALGOL 60. He was a member of the International Federation for Information Processing (IFIP) IFIP Working Group 2.1 on Algorithmic Languages and Calculi,[1] which specified, maintains, and supports ALGOL 60 and ALGOL 68.[2]