IMO or Imo may refer to:

Biology and medicine

Irish Medical Organisation The Irish Medical Organisation ( Irish: ''Ceardchumann Dhochtúirí na hÉireann'' ) is a professional association for doctors in Ireland, and is also a trade union representing doctors in negotiations with the Irish government. The IMO was for ...

, the main organization for doctors in the Republic of Ireland *

Intelligent Medical Objects Intelligent Medical Objects (IMO) is a privately held company specializing in developing, managing and licensing medical vocabularies. IMO partners with various health care organizations, medical content providers and EHR developers. Founded ...

, a privately held company specializing in medical vocabularies *

Isomaltooligosaccharide Isomaltooligosaccharide (IMO) is a mixture of short-chain carbohydrates which has a digestion-resistant property. IMO is found naturally in some foods, as well as being manufactured commercially. The raw material used for manufacturing IMO is starc ...

, a mixture of short-chain carbohydrates which has a digestion-resistant property * Idiopathic Massive Osteolysis, a name for

Gorham's disease Gorham's disease (pronounced GOR-amz), also known as Gorham vanishing bone disease and phantom bone disease, is a very rare skeletal condition of unknown cause, characterized by the uncontrolled proliferation of distended, thin-walled vascular ...

Maritime

* International Maritime Organization **

IMO number The IMO number of the International Maritime Organization is a generic term covering two distinct meanings. The IMO ship identification number, is a type of hull number used as a unique ship identifier, and the IMO company and registered owne ...

, a unique identity number issued to seacraft (pattern "1234567") * SS ''Imo'', a 1889 ship involved in the Halifax Explosion

Meteorology

International Meteorological Organization The International Meteorological Organization (IMO; 1873–1951) was the first organization formed with the purpose of exchanging weather information among the countries of the world. It came into existence from the realization that weather systems ...

* Icelandic Meteorological Office

Other

International Mathematical Olympiad The International Mathematical Olympiad (IMO) is a mathematical olympiad for pre-university students, and is the oldest of the International Science Olympiads. The first IMO was held in Romania in 1959. It has since been held annually, except i ...

International Meteor Organization The International Meteor Organization (IMO) was formally founded in 1988 from predecessor gatherings over many years. IMO has several hundred members and was created in response to an ever-growing need for international cooperation on amateur and ...

* Imo State, Nigeria * imo.im, a video calling and instant messaging app * IMO (in my opinion), an Internet slang expression * Integration Management Office see Post-merger integration {{disambiguation