1. <language> 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Superseded by REXX.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. <operating system> An archaic operating system from UNIVAC. By about 1980 it had been replaced by EXEC 8.
[Dates? Did EXEC 3 to EXEC 7 exist?]