GeezerVison

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. It influenced Simula.^[3]

Though earlier versions were released into the public domain, SIMSCRIPT was commercialized by Markowitz's company, California Analysis Center, Inc. (CACI), which produced proprietary versions SIMSCRIPT I.5^[4][5] and SIMSCRIPT II.5.

SIMSCRIPT II.5^[6][7] was the last pre-PC incarnation of SIMSCRIPT, one of the oldest computer simulation languages. Although military contractor CACI released it in 1971, it still enjoys wide use in large-scale military and air-traffic control simulations.^[8][9]

SIMSCRIPT II.5 is a powerful, free-form, English-like, general-purpose simulation programming language. It supports the application of software engineering principles, such as structured programming and modularity, which impart orderliness and manageability to simulation models.^[10]

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.^[14] The latest version is Release 5; earlier versions already supported 64-bit processing.^[15]

A PL/I implementation was developed during 1968–1969, based on the public domain version released by RAND Corporation.^[16]

• QUIKSCRIPT
• GPSS

• CACI SIMSCRIPT page
• History of Programming Languages: SIMSCRIPT
• Oral history interview with Harry M. Markowitz, Charles Babbage Institute, University of Minnesota - Markowitz discusses his development of portfolio theory, sparse matrices, and his work at the RAND Corporation and elsewhere on simulation software development (including computer language SIMSCRIPT), modeling, and operations research.