HIO may refer to:
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Hillsboro Airport
Hillsboro Airport , also known as Portland–Hillsboro Airport, is a corporate, general aviation and flight-training airport serving the city of Hillsboro, Oregon, Hillsboro, in Washington County, Oregon, Washington County, Oregon, United States ...
, in Washington County, Oregon, United States
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Hypoiodous acid
Hypoiodous acid is an inorganic compound with the chemical formula . It forms when an aqueous solution of iodine is treated with mercuric or silver salts. It rapidly decomposes by disproportionation:
:
Hypoiodous acid is a weak acid with a ...
, an oxidising agent
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Hybrid input-output algorithm, in coherent diffraction imaging
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Oslo University College
Oslo University College (; HiO) was the largest state university college in Norway from 1994 to 2011, with more than 18,000 students and approximately 1800 employees. , the largest state university college in Norway
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Østfold University College
Østfold University College (, HiØ) is a University college (Scandinavia), university college in Østfold, Østfold county, Norway. It has campuses in Fredrikstad and Halden, and has around 7000 students (as of 2017) and 550 employees (as of 20 ...
, a further and higher education institution in south-eastern Norway
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Tsoa language, spoken in Botswana and Zimbabwe
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