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)].
(05 Jan 1995)