Om (disambiguation)
- .om
- Amateur radio operator
- Aum (disambiguation)
- Aum Shinrikyo
- Bacterial outer membrane
- Bucegi Mountains
- Builder's Old Measurement
- Fantastic Planet
- List of Old Marlburians
- MIAT-Mongolian Airlines
- Minim (religious order)
- OAM (disambiguation)
- OM (Negură Bunget album)
- OM Festival
- OMS (disambiguation)
- OMX
- Occupational medicine
- Odyssey of the Mind
- Of Machines
- Offering memorandum
- Officine Meccaniche
- Ohm (disambiguation)
- Old Millfieldians
- Olympique de Marseille
- Olympus OM system
- Om
- Om (1995 film)
- Om (2003 film)
- Om (2018 film)
- Om (Ibarra album)
- Om (John Coltrane album)
- Om (Niklas Strömstedt song)
- Om (Soulfly album)
- Om (The Moody Blues song)
- Om (band)
- Om (river)
- Om Bhutkar
- Om Puri
- Om Records
- Om Sahani
- Om Shanti Om
- Om family
- Oman
- Omkara (disambiguation)
- Omu (disambiguation)
- OneTaste
- Openmoko Linux
- Operating margin
- Operation Mindfuck
- Operation Mobilisation
- Order of Manitoba
- Order of Merit
- Order of Merit (Jamaica)
- Order of the Minims
- Organic matter
- Oromo language
- Osipkov–Merritt model
- Osteomyelitis
- Otitis media
- Oto-Manguean languages
- Pakpilai Thavisin
- Rajiv Hari Om Bhatia
- Rashtra Kavach Om
- Rede OM Brasil
- Øm Abbey