Apo

Apo or APO may refer to:

• Acting Pilot Officer, the lowest commissioned grade in the Royal Air Force
• Apo, along with Datu, one of the traditional Philippine titles of nobility; meaning "elder"
• Apo, a god of mountains in Inca mythology

• Abdullah Öcalan (born 1949), a founding member of Kurdistan Workers' Party (PKK)
• Apo Avedissian (born 1990), Armenian-American artist

• Apache Point Observatory, an observatory in the Sacramento Mountains in Sunspot, New Mexico, United States
• Apo-eup, an administrative division (eup) in Gimcheon, Gyeongsangbuk-do, central South Korea
• Apo Island, a volcanic island in the Philippines
• Apo (island), a coral reef island in the Philippines
• Lake Apo is a crater lake in Barangay Guinoyoran in the city of Valencia in Bukidnon province in the Philippines
• Karaš River or Apo, a tributary of the Danube in the Banat region of Serbia and Romania
• Mount Apo, a stratovolcano on the island of Mindanao in the Philippines
• Antonio Roldán Betancourt Airport IATA code, Apartadó, Columbia

• ABS-CBN Philharmonic Orchestra
• Aldworth Philharmonic Orchestra, the orchestra of Reading Blue Coat School
• APO Hiking Society, a Filipino singing group
• Armenian Philharmonic Orchestra
• Auckland Philharmonia Orchestra

• African People's Organisation, a political organization for Coloured people in early twentieth century South Africa
• Alpha Phi Omega, a U.S. service fraternity
• Alpha Psi Omega, a U.S. honors theatre society
• Analysis & Policy Observatory (APO) (formerly Australian Policy Online), a digital library of policy and practice resources
• Apotex, Canadian pharmaceutical company, producer of generic drugs
• Association for Professional Observers, an association of fisheries observers
• Außerparlamentarische Opposition, a political protest movement in West Germany during the 1960s and 1970s

• Acute pulmonary oedema, fluid accumulation on the lungs
• Apo (drink), an alcoholic beverage of Northeast India
• Apochromat, a type of photographic or other lens
• Apoprotein (disambiguation), a protein without its bound cofactor
• Army Post Office: chiefly U.S. Army and U.S. Air Force postal facilities
• Authorized Personnel Only, a fictional black ops unit on Alias
• Alternative Public Offering

• Apolipoprotein, lipid-binding protein
• AP0 (disambiguation)
• APU (disambiguation)