PL/P is a programming language created in 1978.
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The PL/P programming language (an acronym of Programming Language for Prime (computers)) is a mid-level programming language developed by Prime Computer to serve as their second primary system programming language after Fortran IV. PL/P was a subset of PL/I. Additions to the PRIMOS operating system for Prime 50 Series computers were written mostly in PL/P in later years. Read more on Wikipedia...