8M file extension is for Math 8 extended character set printer font PageMaker
Similar to 8M
A00 - Archive Section of a file distributed by archivesA01 - OzWin CompuServe E-mail/Forum Access SYSOP File
A01 - ARJ Multi-volume Compressed Archive
A10 - OzWin CompuServe E-mail/Forum Access SYSOP File
A11 - AIM Graphics file
A21 - Soundweb Firmware File
A2A - APLASCII EISPACK file
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