Editing Ha

{{Wiktionary|ha|HA|Ha|hA}}
'''Ha''' may refer to:
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==Agencies and organizations==
* [[Health authority]], a former type of administrative organisation of the NHS in England and Wales
* [[Hells Angels Motorcycle Club]]
* [[Highways Agency]] (renamed ''Highways England'', now ''National Highways''), UK government body maintaining England's major roads <!-- intentionally duplicated -->
* [[Homelessness Australia]], peak body organisation for homeless people and services
* [[Homosexuals Anonymous]] an ex-gay program for dealing with unwanted same-sex attractions
* [[Hong Kong Housing Authority]]

==Arts, entertainment, and media ==
* [[Ha (Doseone album)|''Ha'' (Doseone album)]], 2005
* [[Ha (Talvin Singh album)|''Ha'' (Talvin Singh album)]], 2002
* [[Ha! (Killing Joke album)|''Ha!'' (Killing Joke album)]], 1982
* [[Ha (song)|"Ha" (song)]], by Juvenile
* [[Ha! (TV channel)]], an American all-comedy TV channel
* ''[[Hamar Arbeiderblad]]'', a Norwegian newspaper
* ''[[Human Action]]'', a book by the Austrian economist Ludwig von Mises
* [[The Jim Henson Company]], formerly known as ha!

==Language==
* [[Ha (Javanese)]] (ꦲ), a letter in the Javanese script
* [[Ha (kana)]], in syllabic Japanese script
*<big>ه</big> ([[He (letter)#Arabic hāʾ|hāʾ]]), <big>ح</big> ([[Heth#Arabic ḥāʾ|ḥāʾ]]), or <big>خ</big> ([[ḫāʾ]]), Arabic letters
* [[Ha language]], the language of the Ha people in eastern Africa
* [[Hausa language]], ISO 639-1 code HA

==Places==
* [[Ha, Bhutan]]
* [[Hå]], Norway
* [[Ha Gorge]], Greece
* [[HA postcode area]], a group of English postal districts in north-west London
* [[Henan]], a province of China (Guobiao abbreviation HA)

==Science and technology==
===Chemistry===
* [[Hahnium]], an element now called Dubnium
* [[Hyaluronan|Hyaluronan (Hyaluronic acid)]], a carbohydrate structure
* [[Hydroxylapatite]], a mineral

===Medicine===
* [[Hyperandrogenic anovulation]], also called polycystic ovary syndrome
* Health anxiety (HA) or [[hypochondriasis]] (hypochondria)
* [[Hemagglutinin (influenza)]] (HA), an antigenic glycoprotein from Influenza viruses
* [[Hemagglutination assay]], a measurement of viruses or bacteria

===Units of measure===
* [[Hartree]], an atomic unit of energy
* [[Hectare]] (ha), a unit of area
* [[Hectoampere]], a unit of electric current

===Other uses in science and technology===
* [[ha (function prefix)]] (half), a prefix for some trigonometric functions in mathematics
* [[High availability]], systems design and implementation with a view to maximising service
* [[Hour angle]], in astronomy, one of the coordinates of the equatorial coordinate system
* H<sub>a</sub>, or [[alternative hypothesis]], in statistical testing
* [[H-alpha]] (Hα), a deep-red visible spectral line of the hydrogen atom

==Surnames==
*[[Ha (Chinese surname)]] ([[wiktionary:哈|哈]]), found in the ''[[Hundred Family Surnames]]''
*[[Ha (Korean surname)]] ({{lang|ko|하}}, 河 or 夏)
*[[Hà]], Vietnamese surname
*[[Xia (surname)]] ([[wiktionary:夏|夏]]), romanized as Ha in Cantonese, Korean and Vietnamese pronunciation<!-- *Ha (河), Korean surname
*Ha (賀), Chinese and Korean surname --><!-- these are not useful until they have articles to link to -->

==Transportation==
* [[British Rail Class 71]], a locomotive (classified type HA under the Southern Region's pre-TOPS scheme)
* [[Hawaiian Airlines]] (IATA designator HA)
* [[Highways Agency]] (now ''National Highways''), UK government body maintaining England's major roads <!-- intentionally duplicated -->

==Other uses==
* [[Ha (mythology)]]
* Ha, one of deities [[Heng and Ha]]
* [[Ha people]], a Tanzanian people
* [[Hospitalman Apprentice]], a U.S. Navy rank

== See also ==
* [[Haa (disambiguation)]]
* [[Haha (disambiguation)]]
* [[Has (disambiguation)]]

{{disambiguation}}