1. Computer Structure Language.A computer {hardware description language}, written in {BCPL}.["Computer Structure Language (CSL)", Proc 1975 Symp on Comp Hardware Description Languages and their Appl, ACM (Sep 1975)].2. Control and Simulation Language.A language for industrial simulation from Esso and IBM.["Control and Simulation Language", J.N. Buxton et al, Computer J 5(3):194-199 (Oct 1962).Version: CSL 2 (1966 for IBM 7094)].