IH may refer to:
In science and technology
editIn medicine
edit- Immune-histochemistry
- intrauterine hypoxia
- Hepatitis A (infectious hepatitis)
- Idiopathic hypersomnia
- Intracranial hypertension
Other uses in science and technology
edit- Industrial hygiene, the control and prevention of hazards in a work environment
- Ih, full icosahedral symmetry
Other uses
edit- ih, see List of Latin-script digraphs#I
- Információs Hivatal, a Hungarian intelligence office
- International House World Organisation
- International Harvester, a manufacturer of agricultural machinery, construction equipment, trucks, and other products
- IH, notation for intersection homology groups
- Interstate Highway