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)