Early PL/I definition language
(EPL) A PL/I
subset dialect by McIlroy, Morris et al, the first running PL/I compiler
. It was used by Bell Labs
to write Multics
. EPL had extensions to handle the segment/offset nature of Multics
See also REPL
["EPL Reference Manual", Project MAC, April 1966].
[Sammet 1969, p. 542].