Ha
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Ha".

Look up ha, HA, Ha, hA in Wiktionary, the free dictionary.

HA, Ha, ha, and hA can refer to various things, depending on case.

ha as an official abbreviational suffix means either:

• hectare (ha), SI (metric system) unit of surface area
• the ISO 639 alpha-2 language code for the widely spoken African Hausa language (a Chadic language in linguistics)

The all-uppercase HA may refer to:

• the Highways Agency is an executive agency, part of the Department for Transport in the United Kingdom
• the Ha! comedy channel, one of the precursors to Comedy Central
• the British Rail pre-TOPS classification for twenty-four electric locomotives, later known as British Rail Class 71
• Haiti (FIPS 10-4 country code)
• Hawaiian Airlines (IATA airline designator)
• Hearst-Argyle, a media company in the United States
• Hells Angels, a motorcycle club
• hemagglutinin or hemagglutination assay, in virology
• High availability, as in a high-availability cluster
• Home Agent, as in Mobile system
• Home automation
• homeowners association
• Hong Kong Housing Authority
• Hospital Authority (Hong Kong)
• housing association
• HA postal area
• Hyaluronan
• Hydroxyapatite
• Head Automatica
• Headache
• HA (video format)

Ha can mean:

• Ha (ethnic group), a people in Tanzania
• Hāʼ, a letter of Arabic alphabet (ﻩ)
• Kha, a letter of Cyrillic alphabet
• Ha (kana), romanisation of the Japanese kana は and ハ
• Ha, Bhutan
• Ha (mythology), a minor deity in Egyptian mythology
• the former symbol for chemical element 105, first called hahnium (Ha), now called dubnium (Db). See element naming controversy
• Hå, a municipality in Norway
• "Ha", the lead single from Juvenile's album 400 Degreez

hA can mean:

• Hectoampere, an SI unit of electric current (worth 100 A)

See also

• Haha, disambiguation

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