PL/I

Website: www.ibm.com/products/pli-compiler-zos

Designed by: IBM, the SHARE Language Development Committee, and ISO

PL/I (Programming Language One, pronounced and sometimes written PL/1) is a procedural, imperative computer programming language initially developed by IBM.

The PL/1 ANSI standard, X3.53-1976, was published in 1976.

It is designed for scientific, engineering, business and system programming.

It has been in continuous use by academic, commercial and industrial organizations since it was introduced in the 1960s.PL/I’s main domains are data processing, numerical computation, scientific computing, and system programming.

It supports recursion, structured programming, linked data structure handling, fixed-point, floating-point, complex, character string handling, and bit string handling.

The language syntax is English-like and suited for describing complex data formats with a wide set of functions available to verify and manipulate them.