Files with RED extension an also be found in relation to Modula-2 programming language.
RED file extension - Clarion Modula-2 path info
What is red file? How to open red files?
File type specification:
The RED file extension is also reported to be related to Modula-2.
Modula-2 is a programming language developed by Niklaus Wirth at ETH in Zurich, Switzerland in the late 70's. Wirth also developed Algol-W, Pascal, Modula, and Oberon.
Modula-2 corrects some of the deficiencies of Pascal. It is suitable for learning programming, for large projects written and maintained in the fashion of professional software engineers, and for real time embedded systems. Modula-2 is small, expressive, easy to learn and to read.