(EPL) A PL/ISubSet 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)