Ha may refer to:

Agencies and organizations

* Health authority * Hells Angels Motorcycle Club * Highways Agency (now ''National Highways''), UK government body maintaining England's major roads * 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 The Hong Kong Housing Authority (HA) is the main provider of public housing in Hong Kong. It was established in April 1973 under the Housing Ordinance and is an agency of the Government of Hong Kong. In the same year, the Resettlement Departm ...

Highways Agency, or (HA), former name of Highways England, part of England's Department for Transport

Arts, entertainment, and media

* ''Ha'' (Doseone album), 2005 * ''Ha'' (Talvin Singh album), 2002 * ''Ha!'' (Killing Joke album), 1982 * "Ha" (song), by Juvenile *

Ha! (TV channel) Ha!: TV Comedy Network (commonly known as Ha!) was a short-lived American pay television channel owned by Viacom; it was one of the first American all-comedy channels available in basic-tier television offers. Launched on April 1, 1990, at 7 p.m. ...

, 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) (ha), is a syllable in the Javanese script which represent the sound /ɦɔ/ or /ɦa/. The letter can also represent a null consonant, in which it would be pronounced as /ɔ/ or /a/. It is commonly transliterated to Latin as "ha" or "a" and somet ...

(ꦲ), a letter in the Javanese script * Ha (kana), in syllabic Japanese script *ه ( hāʾ), ح ( ḥāʾ), or خ (

ḫāʾ or or Xe (, transliterated as (DIN-31635), ( Hans Wehr), ( ALA-LC) or ( ISO 233)), is one of the six letters the Arabic alphabet added to the twenty-two inherited from the Phoenician alphabet (the others being , , , , ). It is based on th ...

), Arabic letters * Ha language, the language of the Ha people in eastern Africa *

Hausa language Hausa (; /; Ajami: ) is a Chadic language spoken by the Hausa people in the northern half of Nigeria, Ghana, Cameroon, Benin and Togo, and the southern half of Niger, Chad and Sudan, with significant minorities in Ivory Coast. Hausa is a member ...

, ISO 639-1 code HA

Places

* Ha, Bhutan *

Hå Hå is a municipality in Rogaland county, Norway. It is the southernmost municipality in the traditional district of Jæren. The administrative centre of the municipality is the village of Varhaug. Other villages in Hå include Brusand, Hæen, ...

, 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 (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 The hemagglutination assay or haemagglutination assay (HA) and the hemagglutination inhibition assay (HI or HAI) were developed in 1941–42 by American virologist George Hirst as methods for quantifying the relative concentration of viruses, bact ...

, 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_a, or

alternative hypothesis In statistical hypothesis testing, the alternative hypothesis is one of the proposed proposition in the hypothesis test. In general the goal of hypothesis test is to demonstrate that in the given condition, there is sufficient evidence supporting ...

, in statistical testing

Surnames

Ha (Chinese surname) Ha may refer to: Agencies and organizations * Health authority * Hells Angels Motorcycle Club * Highways Agency (now ''National Highways''), UK government body maintaining England's major roads * Homelessness Australia, peak body organisation f ...

( 哈), found in the '' Hundred Family Surnames'' * Ha (Korean surname) ( 하, 河 or 夏) * Hà, Vietnamese surname * Hạ, Vietnamese surname * Xia (surname) ( 夏), romanized as Ha in Cantonese, Korean and Vietnamese pronunciation

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

Other uses

* Ha (mythology) * Ha, one of deities Heng and Ha * Ha people, a Tanzanian people *

Hospitalman Apprentice A hospital corpsman (HM r corpsman is an enlisted medical specialist of the United States Navy, who may also serve in a U.S. Marine Corps unit. The corresponding rating within the United States Coast Guard is health services technician (HS) ...

, a U.S. Navy rank