WOA

WOA may refer to:

In computing

• Web-oriented architecture, a computer systems architectural style
• Windows RT, a computer operating system formerly known as Windows on ARM

In military conflicts

• War of Attrition, a conflict between Israel and Egypt
• War of aggression

In 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

In sport

• World Olympians Association
• Welsh Orienteering Association

Other

• World Ocean Atlas
• World of Art, a series of books on art
• the ICAO airline designator for World Airways
• World of Arch, a video game