What does oh stand for?

Hospitaller Brothers of St. John of God (TOCD)

Office Hours (AD)

Omni Hora - Hourly - Latin (AD)

On Hand (AD)

Open Hearth (AD)

Out Home (AD)

Oval Head (AD)

Overhead (AD)

Ohio Courts of Appeals Reports - A publication (DLA)

Oholoth (BJA)

Comair - ICAO designator (AD)

Finland - International civil aircraft marking (ODBW)

Hamilton Public Library, Ontario - Library symbol - National Library of Canada (NLC)

Hospitaller Order of St. John of God - Roman Catholic men's religious order

Hydroxy - As substituent on nucleoside - Also, HO - Biochemistry

Hydroxycorticosteroid - Endocrinology (DAVI)

Hydroxyl (SAUS)

Hydroxyl ion of water (SAUS)

Hydroxyl Radical (AD)

Oakwood Homes Corp. - NYSE symbol (SPSG)

Observation Helicopter

Obstructive Hypopnea (DMAA)

Occipital Horn - Brain anatomy

Occupational Health

Occupational History - Medicine

Ocular Herpes - Medicine (AD)

Ocular Hypertension (MELL)

Off Hook - Computer science

Office Hours

Office of Hydrology (SAUS)

Office of the Handicapped

Official Hostess (BARN)

Ohio - Postal code

Ohio Field Office (SAUS)

Ohmic Heating

Oil Hardened (SAUS)

Oil Hardening (SAUS)

Old Harrovian (WDAA)

Olduvai Hominid - Paleoanthropology

Oligomer Hybridization (DMAA)

Omega House (AD)

Omni Hora - Every Hour - Pharmacy

On Hand

Ontario Hydro (SAUS)

Ontario Hydroelectric - Canada

Open Hearth

Open Heart Surgery - Medicine

Opera House (AD)

Operand Holen (SAUS)

Operating Hours (MCD)

Operational Handbook - Marine Corps

Operational Hardware (KSC)

Operator's Handbook

Opposite Hand (OA)

Optical Harness (SAUS)

Orah Hayyim Shulhan 'Arukh (BJA)

Oral Hygiene - Dentistry (DAVI)

Originating Hospital - Aeromedical evacuation

Orthohydrogen (SAUS)

Orthostatic Hypotension - Medicine

Osteopathic Hospital (DAVI)

Ostholstein - German license plate city code

Otago Hussars - British military (DMA)

Outer Housing (COE)

Out Home - Men's lacrosse position

Outlaw HAWK - Naval Air Development Center

Out of Hospital (DMAA)

Outpatient Hospital - Medicine

Overall Height - of the Vehicle - TII (TAG)

Overhaul

Overhead

Ozar Hatorah (EA)

San Francisco and Oakland Helicopter Airlines (SAUS)

SFO - San Francisco and Oakland Helicopter Airlines, Inc. - ICAO designator (OAG)