PL/M

PL/M, short for Programming Language for Microcomputers, is a high level programming language designed by Gary Kildall in 1973 while he was at the Naval Postgraduate School in Monterey, California. It drew on ideas from PL/I and XPL and included its own macro processor. Kildall pitched the language to Intel's microcomputer software manager Hank Smith, and the original compiler targeted Intel's 8008 microprocessor; a later version, PL/M-80, generated code for the 8080 and compatible processors such as the Intel 8085 and Zilog Z80, with further versions supporting the 8051 microcontroller family and 8086 based processors. PL/M is generally described as the first higher level programming language written for microprocessor based computers, and Kildall used it to write disk operating system software that became the basis for CP/M, one of the most influential early operating systems. This description is adapted from Wikipedia contributors under CC BY-SA 4.0; changes were made. https://creativecommons.org/licenses/by-sa/4.0/