Files with mmm file extension are used by MiraMon, a GIS program. An mmm file contains maps data.
MMM file extension - MiraMon maps data
What is mmm file? How to open mmm files?
File type specification:
The mmm file extension is associated with MiraMon, A GIS (Geographic Information System) software for Microsoft Windows operating system, developed by CREAF.
The mmm file contains uncompressed map used by MiraMon.
This mmm 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.