'''AH''' and variants may refer to: * Ah!, an exclamation * AH (''Anno Hegirae''), Latin for Islamic "in the year of the Hijra" similar to the Latin for the Christian year ''Anno Domini'' {{TOC right}}
==Music== * "Ah", song by Charles Aznavour written by Charles Aznavour and José Lucchesi 1954 * "Ah" (song), a Japanese song by Superfly * "Ah", a song by the Turkish band Duman 2002
==Games and literature== * Achievement Hunter, a Texas-based online video gaming community * Adam Hughes, a comic artist who signs his work "AH!" * Alternate history, a subgenre of speculative fiction * ''Arcana Heart'', a video game series * Avalon Hill, makers of military-themed board games
==Places== * Afghanistan, World Meteorological Organization country code * Anhui, a province of China (Guobiao abbreviation AH) * Austria-Hungary, a former European empire
==Aviation== * Air Algérie IATA designator * Artificial Horizon, an attitude indicator, an aircraft cockpit instrument * US military designation of an attack helicopter
==Computing== * AH register, the high byte of an X86 16-bit AX register * Authentication Header (AH), a part of the IPsec protocol suite
==Disease, ventilation and electricity== * Adenomatous hyperplasia; see endometrial adenomatous hyperplasia and atypical adenomatous hyperplasia * Air handler, or air handling unit (AHU), a device used to condition and circulate air * Ampere hour, a unit of electric charge
==Other fields== * ''Aegyptiaca Helvetica'', an archaeological journal published by Schwabe (publisher) * Ah (digraph), a digraph used in Taa language orthography * Albert Heijn, a Dutch supermarket chain owned by Ahold * ''Alkotmányvédelmi Hivatal'', the Constitution Protection Office, a Hungarian intelligence agency * Asian Highway Network, a project among countries in Asia and Europe to improve the highway systems in Asia * Adolf Hitler, leader of Nazi Germany from 1933 - 1945 * A US Navy hull classification symbol: Hospital ship (AH) * Ahal (vehicle registration suffix AH)
==See also== * AAH (disambiguation) * AHH (disambiguation) * A-ha, a New Wave/Synthpop band from Norway * Aa! Japanese band * {{lookfrom}} * {{intitle}} * Ah Ah Ah (disambiguation)
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