IH

IH may refer to:

In medicine

 * Immune-histochemistry
 * intrauterine hypoxia
 * Hepatitis A (infectious hepatitis)
 * Idiopathic hypersomnia
 * Intracranial hypertension

Other uses in science and technology

 * Hydrogen iodide
 * Induction heating
 * Induction heater


 * Industrial hygiene, the control and prevention of hazards in a work environment
 * Ih, full icosahedral symmetry

Other uses

 * ih, see List of Latin-script digraphs
 * Interstate Highway
 * International House World Organisation
 * Információs Hivatal, a Hungarian intelligence office
 * International Harvester, a manufacturer of agricultural machinery, construction equipment, trucks, and other products