Encyclopedia article containing a brief history of the language, a discussion of design and implementation issues, and the advances PL/I contributed to language design.
IBM research report describing the extension of PL8 to support 64-bit addressing, its implementation as a GCC front end, and the validation of the new compiler. Evaluation of PL8 as a language for highly reliable low-level programming.
Language processing technologies and services for PL/I. The RainCode Engine for PL/I parses "virtually all PL/1 dialects available today" for quality assessment, migration, standards compliance, and documentation.
Reference for the PL/M 386 language and compiler. Includes language description and grammar, differences between various PL/M versions, and how to link and run a PL/M 386 program.