Structured assembly language for the IBM 360 and IBM 370 , with a few high-level constructs. Syntactically it resembles ALGOL 60 . Its grammar is defined entirely by operator precedence.
["PL/360, A Programming Language for the 360 Computers", N. Wirth, J ACM 15(1):37-74 (Jan 1968)].
(1995-01-05)