PL1 file extension - PL/1 programming language source file
What is pl1 file? How to open pl1 files?
File type specification:
The PL1 file extension is associated with the PL/1 programming language. PL/1 was developed as an IBM product in the mid 1960's, and was originally named NPL (New Programming Language). The name was changed to PL/1 to avoid confusion of NPL with the National Physical Laboratory in England.
PL/1 was the first large-s cale attempt to design a language that could be used in a variety of application areas.
The .pl1 file stores source code written in PL/1 programming language. Various programming languages store source codes in simple text files. Try any text editor to view content of PL1 file.