Files that contain the .mf file extension are used for the Adobe FrameMaker software application. Adobe FrameMaker is used mainly by technical writers for desktop publishing projects that are geared towards technical writing and documentation projects. When a file is created and saved in the Adobe FrameMaker program, it is assigned the .mf file extension.
Java also uses the .mf file extension for Java Manifest Files. These files contain information about a Java file archive.
Some files that contain the .mf file extension are also used by the Metafont typesetting program. The MF files that are used by this application contain the Metafont text files.
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If you have additional information about the MF file format or software that uses files with the MF suffix, please do get in touch - we would love hearing from you.