A .is file extension is related to the Modula-3 programming language.
There is one other file type using
the IS file extension!
.is - InStereo audio file
IS file extension - Modula-3 intermediate assembly data
What is is file? How to open is files?
File type specification:
The is file extension is associated with the Modula-3 programming language that has been used in research circles. it has not been adopted widely in industry. The .is file stores intermediate assembly data.
Modula-3 was designed by Luca Cardelli, Jim Donahue, Mick Jordan, Bill Kalsow and Greg Nelson at the Digital Equipment Corporation (DEC) Systems Research Center (SRC) and Olivetti in the late 1980s.
This is file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.