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)