PL/P

PL/P is a programming language designed for developing systems software. It was originally developed by AT&T Bell Laboratories in the early 1970s. PL/P is a high-level language that combines the features of both assembly language and a higher-level language such as FORTRAN. PL/P programs are compiled into machine code, which can be executed directly by the computer's CPU. PL/P includes a rich set of features for developing system software, including support for interrupts, multitasking, and memory management. It also includes a powerful set of string-handling functions. PL/P is no longer widely used, but it remains an important part of the history of programming languages.