WWF may refer to: World Wide Fund for Nature, a nature conservation organization previously named World Wildlife Fund (and still using the former name in some markets) World Wrestling Federation, the name used from 1979 to 2002 by the professional wrestling company now known as WWE Welded wire fabric, a reinforcing material typically used in poured concrete slabs Working Women's Forum, an organisation in India World Water Forum, an international forum for water issues Windows Workflow Foundation, Microsoft's workflow management framework Wiscasset, Waterville and Farmington Railway, a former 2 foot gauge railroad in Maine, United States WWF (file format), a campaign to produce PDF electronic documents that forbid printing Words with Friends, a game for Apple and Android platforms Waterside Workers' Federation, a former Australian trade union, now the Maritime Union of Australia