Is it farther or further?
Programming Language/Microcomputers. MAA (later Digital Research) for Intel, 1972. A very low level language incorporating ideas from PL/I, ALGOL and XPL. Integrated macro processor. Originally the implementation language for CP/M. "PL/M-80 Programming Manual", Doc 98-268B, Intel 1976. "A Guide to PL/M Programming for Microcomputer Applications", D. McCracken, A-W 1978. Versions: PL/M-80, PL/M-86, PL/M-286.