Computer Dictionary/Continuous System Simulation Language
CSSL(Continuous System Simulation Language) versions I, II, III, IV and V have been commercially available since 1968. CSSL-I was developed for Jet Propulsion Labs in 1968. CSSL-III was widely distributed from 1969-1975. CSSL-IV (interactive version) was developed by R. Nilsen and ran on over 30 different computers. Currently CSSL-V is marketed by Simulation Services International and available on PCs and workstations.
["The SCi Continuous System Simulation Language (CSSL)", Simulation, 9(6), Dec 1967].