GPSS

General Purpose Simulation System (GPSS) is a discrete time simulation general-purpose programming language, where a simulation clock advances in discrete steps. A system is modelled as transactions enter the system and are passed from one service (represented by blocks) to another. It is used primarily as a process flow oriented simulation language; this is particularly well-suited for problems such as a factory. General Purpose Simulation System (GPSS) is a discrete time simulation general-purpose programming language, where a simulation clock advances in discrete steps. A system is modelled as transactions enter the system and are passed from one service (represented by blocks) to another. It is used primarily as a process flow oriented simulation language; this is particularly well-suited for problems such as a factory. GPSS was developed by IBM's Geoffrey Gordon at the beginning of the 1960s. He named it Gordon's Programable Simulation System. The name was changed when IBM decided to release it as a product.