HI
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HI can mean:
- Hawaii, U.S. postal abbreviation
- Holton Interurban Railway Template:Reporting mark
- HI – The chemical formula for anhydrous hydroiodic acid.
- University of Iceland, from Icelandic Háskóli Íslands
- In biology, HI is a Haemagglutination inhibition assay.
- Hostelling International
- Hamersley Iron Pty Ltd, a mining company operating mines in Australia.
See also: Hi