• Abilene Christian University
  Abilene Christian University
  Abilene Christian University is a private university located in Abilene, Texas, affiliated with Churches of Christ. ACU was founded in 1906, as Childers Classical Institute...
  
  , a private Christian university located in Abilene, Texas
• Ahram Candian University, a private Egyptian university located in 6 October City, Giza, Egypt
• American City University
  American City University
  American City University is a private unaccredited offeror of higher education via distance education operating from Los Angeles and Fresno, California. The same name was formerly used by a similar institution that operated from Cheyenne, Wyoming....
  
   in California or Wyoming
• Association of Commonwealth Universities
  Association of Commonwealth Universities
  The Association of Commonwealth Universities represents over 480 universities from Commonwealth countries.- History :In 1912, the University of London took the initiative to assemble 53 representatives of universities in London to hold a Congress of Universities of the Empire...
  
  , an association that represents over 480 universities from Commonwealth countries
• Australian Catholic University
  Australian Catholic University
  Australian Catholic University is a national public university. It has six campuses and offers programs in five faculties throughout Australia.-History:...
  
  , Australia's only public Catholic university
• Ajayi Crowther University
  Ajayi Crowther University
  - External Links :**...
  
  ,a private Christian university located in Oyo, Oyo State Nigeria

• Altura Credit Union
  Altura credit union
  Altura Credit Union is a credit union headquartered in Riverside, California, licensed by the California Department of Financial Institutions and insured by the National Credit Union Share Insurance Fund . The credit union is also part of a network that allows shared branching and a shared network...
  
  , a credit union in California
• American Conservative Union
  American Conservative Union
  The American Conservative Union is an American political organization advocating conservative policies, and is the oldest such conservative lobbying organization in the country.-Organization:...
  
  , a political lobbying group in the United States
• Arab Customs Union
  Arab Customs Union
  The Arab customs union is a customs union announced at the Arab League's 2009 Arab Economic and Social Development Summit in Kuwait in order to achieve a functional customs union by 2015 and an Arab common market by 2020 and to increase inter-Arab trade and integration.The announcement was made by...
  
  , an organization under the Arab League for a Customs Union between Arab Members of the League
• Asian Clearing Union
  Asian Clearing Union
  The Asian Clearing Union , with headquarters in Tehran, Iran, was established on December 9, 1974 at the initiative of the United Nations Economic and Social Commission for Asia and the Pacific...
  
  , an organization that settles international payments between member countries
• Assiniboine Credit Union
  Assiniboine Credit Union
  Assiniboine Credit Union is a credit union based in Winnipeg, Manitoba, and at the end of 2008 was the ninth largest credit union in Canada. ACU has 25 branches in Winnipeg and Northern Manitoba. The credit union merged with Astra and Vantis credit unions in 2007...
  
  , a credit union in Manitoba
• Acu Publishing, an imprint of the German group VDM Publishing devoted to the reproduction of Wikipedia content

• Assault Craft Unit, military units of the United States Navy that specialize in amphibious warfare
• Armoured Command Unit, the key unit in the RTS game Supreme Commander
• Army Combat Uniform
  Army Combat Uniform
  The Army Combat Uniform is the current combat uniform worn by the United States Army. It is the successor to the Battle Dress Uniform and Desert Camouflage Uniform worn during the 1980s and 1990s. It features a number of design changes, as well as a different camouflage pattern from its...
  
  , the combat uniform worn by the United States Army

• Achutupo Airport, an airport in Achutupo
  Achutupo
  - Sources :* – World-Gazetteer.com...
  
  , Panama with the IATA airport code "ACU"
• Auto-Cycle Union, an officially recognised motorcycle governing body of Great Britain
• Automovil Club del Uruguay, a member of the Fédération Internationale de l'Automobile

• Açu
  Açu
  Açu is a municipality in the state of Rio Grande do Norte in Brazil. The population in 2007 is 52,000 , and the area is 1,292 km². This place name comes from the Tupi language.-External links:**...
  
  , municipality in the state of Rio Grande do Norte, Brazil
• Açu River, another name for the Piranhas River in Brazil
• Pariquera-Açu
  Pariquera-Açu
  Pariquera-Açu is a municipality in the state of São Paulo in Brazil. The population in 2004 is 19,950 and the area is 360.52 km². The elevation is 39 m. This place name comes from the Tupi language. Nearest cities are Registro and Cananéia....
  
  , a municipality in the state of São Paulo in Brazil

Other uses

• Administrative Control Unit, an isolated high security prison unit housing violent offenders
• Antenna Control Unit, a controller for satellite antennas
• Asian Currency Unit, a proposed unit of Association of Southeast Asian Nations currency