.PLI File Extension
File TypePL/I Source Code File
What is a PLI file?
Program source code file written in the PL/I (Programming Language One) language; developed by IBM in the 1960s and is often used for business, engineering, and scientific applications.
PL/I is designed to offer robustness, machine independence, structured programming, and dynamic storage management. It also includes several built-in string manipulation functions.