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A high-level programming language used in simulation, in which systems are described in terms of sets, entities, which are groups of sets, and attributes, which are properties associated with entities.
A free-form, English-like general-purpose simulation language produced by Harry Markowitz et al of Rand Corp in 1963. It was implemented as a Fortran preprocessor on IBM 7090 and was designed for large discrete simulations. It influenced Simula. Later versions included SIMSCRIPT I.5 and SIMSCRIPT II.5.