Abstract
The development of the SIMULA I and SIMULA 67 languages was carried out at the Norwegian Computing Center (NCC). However, the early background for the development is the work at the Norwegian Defence Research Establishment (NDRE) in the 1950s. A BULL punched-card calculator had, in 1951–1953, been extended at the NDRE into a card-programmed electromechanical computer. In 1954, it was decided that NDRE should acquire a Ferranti MERCURY computer, then at the design and construction stage, and in the following years the NDRE milieu developed basic software which was fairly advanced for its time. In the late 1950s, the NDRE milieu started work in language design, in which Garwick and OJD were particularly active. This chapter discusses the four main stages that the SIMULA I language went through. At the NCC, the use of SIMULA I for simulation programming started immediately and spread rapidly. In 1965, three SIMULA I courses were given at NCC. The use of SIMULA I up to December 1965 is reported in Nygaard (1965b). A later version of this report covers the period up to June 1968.
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