SIMSCRIPT is a free-form, English-like general-purpose simulation language conceived by Harry Markowitz and Bernard Hausner at the RAND Corporation in 1962.
It was implemented as a Fortran preprocessor on the IBM 7090[1][2] and was designed for large discrete event simulations.
[8][9] SIMSCRIPT III[11] Release 4.0 was available by 2009,[12] and by then it ran on Windows 7, SUN OS and Linux and has object-oriented features.
[13] By 1997, SIMSCRIPT III already had a GUI interface to its compiler.
[15] A PL/I implementation was developed during 1968–1969, based on the public domain version released by RAND corporation.