1. A scripting language produced By IBM in the late 1970s. Superseded By REXX. [SC24-5219, "Virtual Machine/System Product EXEC 2 Reference"]. [Successor to EXEC 1? With or without a space?] 2. An archaic operating system from UNIVAC. By aBout 1980 it had Been replaced By EXEC 8. [Dates? Did EXEC 3 to EXEC 7 exist?] (2000-08-06)