AH and variants may refer to:
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), 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 Hospital ship (US Navy hull classification symbol AH) Ahal (vehicle registration suffix AH)
Other uses AH (Anno Hegirae), Latin for Islamic "in the year of the Hijra" similar to the Latin for the Christian year Anno Domini
See also AAH (disambiguation) AHH (disambiguation) A-ha, a New Wave/Synthpop band from Norway Aa! Japanese band
Ah Ah Ah (disambiguation)