The X
按字母分类：
extension name file type Classification
MBA Martus Bulletin Archive encoding file
MCRP MobyExplorer Encrypted File encoding file
MEO MEO Encrypted Archive encoding file
MFS MetFS Encrypted File System encoding file
MIM Multi-Purpose Internet Mail Message File encoding file
MIME Multi-Purpose Internet Mail Extension encoding file
MJD Adobe Acrobat MIME Encoded Job Definition File encoding file
MME Multi-Purpose Internet Mail encoding file
MNC AutoCAD Compiled Menu File encoding file
MSE 3ds Max Encrypted MAXScript File encoding file