What does UMD stand for?

What does UMD mean?

UMD	Universal Media Disc Computing » Hardware
UMD	University of Maryland Academic & Science » Universities
UMD	University of Minnesota Duluth Academic & Science » Universities
UMD	University of Michigan, Dearborn Academic & Science » Universities
UMD	Universal Media Disk Computing » Security
UMD	Unit Movement Data Governmental » Military
UMD	Unión Militar Democrática Governmental » Politics
UMD	Uummannaq, Greenland Regional » Airport Codes
UMD	Unbelievable Magic Disc Miscellaneous » Funnies
UMD	Unconditional Martingale Difference Academic & Science » Mathematics
UMD	Use Magic Device Miscellaneous » Science Fiction
UMD	Uninterruptible Motor Drive Computing » Hardware
UMD	Unit Manning Document Governmental » Military