AH

AH (also Ah or ah) may refer to:

• Ah!, an exclamation

A-h, aH

• Ah (digraph), a digraph used in Taa orthography
• Ampere-hour, a unit of electric charge
• Attohenry (aH), an SI unit of inductance

AH, acronym

• AH, the United States Navy hull classification symbol for "hospital ship"
• After-hours trading in stock trading
• Air handler, or air handling unit (AHU), a device used to condition and circulate air
• Albert Heijn, a Dutch supermarket chain owned by Ahold
• Adam Hughes, comics artist who signs his work "AH!"
• Constitution Protection Office, Alkotmányvédelmi Hivatal, Hungarian intelligence agency
• Anhui, a Chinese province
• Asian Highway
• Auction house
• Austria–Hungary, a former European empire
• Hijri year (Anno Hegirae) in the Islamic calendar
• Adenomatous hyperplasia; see endometrial adenomatous hyperplasia and atypical adenomatous hyperplasia

In aviation

• AH-1 Cobra, a model of attack helicopter
• AH-64 Apache, a model of attack helicopter
• Artificial Horizon, a cockpit instrument (Aviation)
• Air Algérie IATA designator

In computing

• AH register, the high byte of an X86 16-bit AX register
• AH Authentication Header, a part of the IPsec protocol suite

Entertainment

• AH, Alternate History, a subgenre of speculative fiction
• AH Arcana Heart. a video game series
• AH Avalon Hill, makers of military-themed board games
• AH Afterhours.FM, often shortened as Afterhours
• AH Achievement Hunter, Texas based online video-gaming community.

Music

• A-ha, a New Wave/Synthpop band from Norway
• Aa! Japanese band

Songs

• "Ah", song by Charles Aznavour written by Charles Aznavour and José Lucchesi 1954
• "Ah" (song), a Japanese song by Superfly

Similar glyphs

• АН, the Democratic Party of Mongolia

See also

• All pages beginning with "AH"
• All pages with titles containing AH