OGM

OGM is:

Oberhausen Building Management GmbH
OGM Society for Marketing
a file extension for Ogg Media
an Austrian opinion research institute, see Austrian Society for Marketing
an Austrian association for the promotion of music Austrian Society for Music
in French an abbreviation for organisme génétiquement modifié , see genetically modified organism
in English the abbreviation for outgoing message , the outgoing message or the announcement text of an answering machine
in Italian the abbreviation for Officine Grandi Motori (industrial archaeological complex in Turin )
in Italian the abbreviation for Organismo geneticamente modificato , see genetically modified organism