DYSAC: a digitally simulated analog computer

A digital computer program which simulates a large electronic analog computer has been written for the CDC 1604 digital computer. In addition to providing many non-linear computing elements rarely found in electronic analog computers, the program accepts the input data in a form which may be written down directly from a block diagram or analog computer wiring diagram. Graphical output in the form of plotted curves is available by use of a digital plotter. The simplicity of the input language permits the program to be used easily by persons having no digital computer experience. This digital computer program, called DYSAC, an acronym for DigitallY Simulated Analog Computer, is, in reality, a complete programming system, and as with FORTRAN, has a special language to facilitate its use.