Structured aSSembly language for the IBM 360 and {IBM 370}, with a few high-level conStructS. Syntactically it reSembleSALGOL 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)