The abbreviation IH stands for:
- Interrupt handler, the program piece is carried out at an interrupt request, interrupt see
- Intrauterine hypoxia
- Inside Height, English for " Headroom "
- International Harvester, a manufacturer of agricultural machinery
- Interstate Highway in the United States
- Inhibiting Hormone
IH as distinguishing signs on license plate:
- Greece: Athens
In the amount is the abbreviation for:
- , In the higher education service ' ( for example: OStR i H. ).
I. H. as a salutation in letters once stood for:
- "Your Excellency / Reverend / Reverend / sovereignty " (see: S. H. ).