A general purpose systems simulation program

Recent years have seen a very rapid growth in the use of digital computers for simulation work, particularly in the field of system studies. The need for such simulation has been generated by the ever-increasing complexity of systems that are being designed, while the speed and capacity of modern digital computers have provided the means by which to expand simulation efforts. The amount of simulation and the complexity of the studies that are being conducted have presented several difficulties in organizing the use of simulation.