PM

PM might refer to
 * Pegasus Mail
 * Perl module - See Perl
 * PM (XV image)
 * Post meridiem - See Date and time formats
 * Presentation Manager, the OS/2 GUI (Wikipedia article)
 * Presentation Manager Bitmap - Probably another name for OS/2 BMP
 * Presentation Manager Metafile
 * PrintMaster
 * XPM

See also Category:File formats with extension .pm