IMO
# IMO

IMO or Imo may refer to:

## Maritime

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

## Meteorology

* International Meteorological Organization
* Icelandic Meteorological Office

## Other

* Irish Medical Organisation, the main organisation representing doctors in Ireland
* Intelligent Medical Objects, a privately held company specializing in medical vocabularies
* Isomaltooligosaccharide, a mixture of short-chain carbohydrates which has a digestion-resistant property
* Idiopathic Massive Osteolysis, a name for Gorham's disease, a rare bone disease
* International Mathematical Olympiad
* International Meteor Organization
* Imo State, Nigeria
* imo.im, a video calling and instant messaging app
* IMO (in my opinion), an Internet slang expression
