(1) (
DivX 
Media 
Format)  A DivX format for encoding movies that uses the DivX codec.  See 
DivX.
(2) (
Distribution 
Media 
Format)  A floppy disk format from Microsoft that was used to distribute its software.  DMF floppies compressed more data (1.7MB) onto the 3.5" diskette, and the files could not be copied with normal DOS and Windows commands.  A DMF utility had to be used.