Project DARE: Differential Analyzer REplacement by on-line digital simulation

While batch-processed applications of convenient, highly developed digital continuous-system simulation languages are now commonplace, such systems do not provide the intimate man-machine intercourse cherished in analog/hybrid simulation. The DES-I system, which combined a special simulation console and a digital plotter with an SDS 9300 (medium-sized) computer was, then, a pioneering effort, unfortunately abandoned by its manufacturer. The only commercially available interactive system appears to be the IBM CSMP 1130 system which, like its predecessor PACTOLUS, can be programmed from a simple typewriter terminal. This is an interpreter system implemented on a small computer and thus yields relatively quite slow execution.