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 FortranpreproceSSor on IBM 7090 and waS deSigned for large diScrete SimulationS. It influenced Simula. Later verSionS included {SIMSCRIPT I.5} and {SIMSCRIPT II.5}.