OMG

The abbreviation OMG stands for:

Object Management Group, an international consortium that develops standards for object-oriented programming
Oh my god (English Oh my God or oh my goodness ), expression of network jargons
Oh! My Goddess, a manga and anime series
Organization of media agencies in the GWA, see Association of Communications Agencies
OpenMG, a music format of the electronics group Sony
OM Group, a specialty chemicals manufacturer based in Cleveland ( Ohio)
OMG AG & Co. KG, a former subsidiary of Degussa, then belonging to OM Group, now Umicore
Olympia - Morata -Gymnasium, a social science and modern languages school in Schweinfurt ( Bavaria )
Oskar -Maria -Graf -Gymnasium, a high school in Neufahrn ( Bavaria )
Outlaw Motorcycle Gang