An m3 file extension is related to the Modula-3 programming language source code files.

There is one other file type using
the M3 file extension!

m3 icon.m3 - Blizzard StarCraft 2 MDX3 model

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M3 file extension - Modula 3 programming language source code

What is m3 file? How to open m3 files?

File type specification:

Source code and script file type icon Source code and script file type

The m3 file extension is associated with Modula-3.

In Computer science, Modula-3 is a programming language conceived as a successor to an upgraded version of Modula-2.

While it has been influential in research circles (influencing the designs of languages such as Java, C#, and Python) it has not been adopted widely in industry. It 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.

Its design was heavily influenced by work on the Modula-2+ language in use at SRC at the time, which was the language in which the operating system for the DEC Firefly multiprocessor VAX workstation was written. As the revised Modula-3 Report states, the language was also influenced by other languages such as Mesa, Cedar, Object Pascal, Oberon and Euclid.

The m3 files contain source codes written in the Modula-3 programming language.

This m3 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.

Help how to open:

This file type is not meant to be opened directly, there is no software that could open and work with it directly, or there is no information available in public sources about opening this file type. This is usually the case of some internal data files, caches, temporary files etc.

How to convert:

As far as we know, this .m3 file type can't be converted to any other file format. This is usually the case of system, configuration, temporary, or data files containing data exclusive to only one software and used for its own purposes. Also some proprietary or closed file formats cannot be converted to more common file types in order to protect the intellectual property of the developer, which is for example the case of some DRM-protected multimedia files.

Related links:

Modula 3 at Wikipedia

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