Appa (Japanese:あっぱ) is a Japanese rock band formed in 2004 by Izawa Keitaro (伊澤啓太郎), Sato Kazuto, and Hotta Hideaki. Since Izawa is well grounded in jazz and classical music, Appa's musical features are influenced by them. The biggest feature of the playing style of Appa is Izawa's piano playing.

Appa is a fictional character on the Nickelodeon animated television series . Appa is the only known living flying bison. He is voiced by Dee Bradley Baker.

Acronym]. American Probation and Parole Association. See also the APPA website.

American Public Power Association. The trade association of publicly-held power entities.

Asian Patent Attorneys Association

APPA is a Haitian democratic political party founded in September, 1999. APPA stands for freedom, development of the country and participation of everyone in the democratic process. The secretary general Lucien Petit, a political scientist, believes that the country will only head toward a positive direction if the people unite together.

a variant of akka, older sister.