AH

• "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==