(EPL) A PL/I subset dialect by McIlroy, Morris et al, the first running PL/I compiler.It was used by {Bell Labs} and {MIT} to write {Multics}.EPL had extensions to handle the segment/offset nature of Multics pointers.See also REPL, TMG.["EPL Reference Manual", Project MAC, April 1966].[Sammet 1969, p. 542].(1995-11-15)