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)].