ATion> (CSSL) Versions include ACSL, HYTRAN, SL-I, S/360 and CSMP. 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]. [URL?] (2003-04-15)