HA, Ha, and ha can refer to various things, depending on case. In orthography and typography, letter case (or just case) is the distinction between majuscule (capital or upper-case) and minuscule (lower-case) letters. ...

The all-uppercase HA may refer to:

• 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 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
• hemagglutination assay, in virology
• high availability, as in a high-availability cluster
• home automation
• homeowners association
• HA postal area
• Hyaluronan

Ha can mean: Comedy Central is a cable television channel in the United States. ... Logo of British Rail British Railways (BR), later rebranded as British Rail, ran the British railway system from the nationalisation of the Big Four British railway companies in 1948 until its privatisation in stages between 1994 and 1997. ... The Total Operations Processing System, better known by its initials TOPS, is a computer system for managing the locomotives and rolling stock (railroad cars) owned by a rail system. ... The British Rail Class 71 was a straight electric locomotive used on the Southern Region of British Railways. ... Hawaiian Airlines is the 11th largest commercial airline in the United States. ... Hearst-Argyle Television, Incorporated, is a broadcasting company in the United States. ... Hells Angels New York City The Hells Angels is a motorcycle club formed in 1948 in Fontana, California, where the local chapter remains active. ... A motorcycle is a two-wheeled vehicle powered by an engine. ... The Hemagglutination Assay (HA) is a quantification of viruses. ... Virology, often considered a part of microbiology, is the study of biological viruses: their structure and classification, their ways to infect and exploit cells to reproduce and cause disease, and their potential uses in research and therapy. ... A protocol and associated execution that ensures a certain relative degree of computing-system operational continuity in any downtime event. ... High-availability clusters (also known as HA Clusters) are computer clusters that are implemented primarily for the purpose of improving the availability of services which the cluster provides. ... Domotics is the application of computer and robot technologies to domestic appliances. ... The examples and perspective in this article or section may not represent a worldwide view. ... The HA postal area is a group of ten postal districts in north west Greater London which are subdivisions of seven post towns. ... Hyaluronan (also called hyaluronic acid or hyaluronate) is a glycosaminoglycan distributed widely throughout connective, epithelial, and neural tissues. ...

• Ha, a people in Tanzania
• Hāʼ, a letter of Arabic alphabet (ﻩ)
• Kha, a letter of Cyrillic alphabet
• 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), later given the systematic name, unnilpentium, and now called dubnium (Db)
• the Hartmann number, in physics
• an interjection used to express joy, surprise, or laughter
• Ha, a book by Osamu Dazai
• a common prefix in Hebrew indicating the definite article.
• 'if' in Hungarian
• 'yes' in Armenian, vernacular
• 'summer' in Vietnamese
• 'huh?' in Icelandic

ha can mean: The Ha are an ethnic and linguistic group based in Kigoma Region in western Tanzania. ... He is the fifth letter of many Semitic alphabets, including Phoenician , Aramaic, Hebrew , Syriac and Arabic , expressing a voiceless glottal fricative (). The Phoenician letter gave rise to the Greek Epsilon, Etruscan , Latin E and Cyrillic Ye. ... The examples and perspective in this article or section may not represent a worldwide view. ... Kha, or Ha, (Х, х) is a letter of the Cyrillic alphabet, representing the voiceless velar fricative /x/ (pronounced like the ch in German Bach). It is derived from the greek letter chi. ... The Cyrillic alphabet (pronounced , also called azbuka, from the old name of the first two letters) is an alphabet used for several East and South Slavic languages—Belarusian, Bulgarian, Macedonian, Russian, Rusyn, Serbian, and Ukrainian—and many other languages of the former Soviet Union, Asia and Eastern Europe. ... Japanese writing Kanji 漢字 Kana 仮名 Hiragana 平仮名 Katakana 片仮名 Manyogana 万葉仮名 Uses Furigana 振り仮名 Okurigana 送り仮名 Rōmaji ローマ字 For other meanings of Kana, see Kana (disambiguation). ... In Japanese, the kana Ha (written as は in hiragana and ハ in katakana) represents a phoneme of the language. ... Haa (alternative spelling Ha) is one of the 20 dzongkhag or districts comprising Bhutan. ... In Egyptian mythology, Ha was a god of the deserts to the west of Egypt. ... Look up deity in Wiktionary, the free dictionary. ... Egyptian mythology or Egyptian religion is the succession of tentative beliefs held by the people of Egypt for over three thousand years, prior to major exposure to Christianity and Islam. ... The periodic table of the chemical elements A chemical element, often called simply an element, is a substance that cannot be decomposed or transformed into other chemical substances by ordinary chemical processes. ... The names for the chemical elements 104 to 108 have been the subject of a major controversy starting in the 1960s which was only finally resolved in 1997. ... In chemistry, heavy transuranic elements receive a permanent name and symbol only after their discovery has been confirmed. ... Known properties Name, Symbol, Number dubnium, Db, 105 Chemical series Transition metals Group, Period, Block 5, 7 , d Appearance unknown; probably metallic, silvery white or gray Atomic weight [262] amu Electron configuration probably [Rn]5f14 6d3 7s2 e- s per energy level 2, 8, 18, 32, 32, 11, 2 State... General Name, Symbol, Number dubnium, Db, 105 Chemical series transition metals Group, Period, Block 5, 7, d Appearance unknown, probably silvery white or metallic gray Atomic mass (262) g/mol Electron configuration perhaps [Rn] 5f14 6d3 7s2 (guess based on tantalum) Electrons per shell 2, 8, 18, 32, 32, 11... Physics (from the Greek, (phúsis), nature and (phusiké), knowledge of nature) is the science concerned with the discovery and understanding of the fundamental laws which govern matter, energy, space and time. ... An interjection is a part of speech that usually has no grammatical connection to the rest of the sentence and simply expresses emotion on the part of the speaker, although most interjections have clear definitions. ... Osamu Dazai (太宰 æ²» Dazai Osamu, June 19, 1909 in Aomori Prefecture - June 13, 1948) was a Japanese author. ... In linguistics, a prefix is a type of affix that precedes the morphemes to which it can attach. ... Hebrew redirects here. ... Definite Article is the title of British comedian Eddie Izzards 1996 performance released on video and CD. The video/DVD and CD performances were both recorded on different nights at the Shaftesbury Theatre in London, England. ...

• hectare (ha), unit of surface area. 1 hectare = 10 000 m²
• the ISO 639 alpha-2 language code for the Hausa language

hA can mean: A hectare (symbol ha) is a unit of area, equal to 10,000 square meters, commonly used for measuring land area. ... To help compare orders of magnitude of different areas, we list here areas between 1 hectare (10,000 m²) and 10 hectares (0. ... ISO 639 is one of several international standards that lists short codes for language names. ... Hausa is the Chadic language with the largest number of speakers, spoken as a first language by about 24 million people, and as a second language by about 15 million more. ...

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

The ampere (symbol: A) is the SI base unit of electrical current equal to one coulomb per second. ...

See also

• Haha, disambiguation

This page disambiguates a two-character combination. If an article link referred you to this page, you may wish to change the link to point directly to the intended article.