WOA may refer to:
Computing
- Web-oriented architecture, a computer systems architectural style
- Windows on ARM (disambiguation), a series of operating systems for ARM architecture computers
- WebObjects application, the file system suffix of an application written using the WebObjects framework from NeXT, later Apple
Wars
- War of Attrition, a conflict between Israel and Egypt
- War of aggression
Music
- Wacken Open Air, the largest exclusively metal music festival in the world
- War of Ages, metalcore band from Pennsylvania
- W.O.A Records of India and Dubai
Sports
Other uses
- World Ocean Atlas
- World of Art, a series of books on art
- the ICAO airline designator for World Airways
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