WAF, or waf, may refer to:

Computing

  • Waf, a software build system written in the Python programming language
  • Web application firewall, a proxy device with protocol awareness of HTTP
  • Web application framework, a software framework that is designed to support the development of dynamic websites, Web applications and Web services
  • Write amplification factor

Culture

  • World Architecture Festival, an annual festival and awards ceremony for architecture
  • "Wabash Always Fights," the rallying cheer of Wabash College

Organisations

  • Welsh Automotive Forum, a company that lobbies the UK government on behalf of the automotive industry in Wales <!--Haven't checked recently, Brexit, etc. -->
  • Women's Air Force (WAF), organized in 1948 and active until 1976
  • Women for America First, an American conservative activist organisation
  • Workers Autonomous Federation, one of several underground trade unions in the People's Republic of China
  • World Archery Federation, a governing sports body
  • World Apostolate of Fátima, a Roman Catholic movement to promote a faith according to the apparitions at Fátima
  • World Armwrestling Federation, a federation of arm wrestling associations which organises world championships
  • Wydad de Fès (Wydad Athletic de Fès), a Moroccan association football club

Science and technology

  • WAF1, a protein implicated in p53 transcriptional regulation
  • Weather and Forecasting, an American Meteorological Society journal
  • Width across flats, the distance between the two flats of a wrench (UK: spanner) or socket
  • Wife acceptance factor (or wife approval factor or wife appeal factor), a colloquialism used in discussions related to hi-fi and home theater equipment, home automation

Transport

  • Wah Fu station, a proposed MTR station in Hong Kong (MTR station code)
  • Wallyford railway station, East Lothian, Scotland (National Rail station code)

Other

  • 'With all faults', a phrase used as a disclaimer of any implied warranty of merchantability (often appears in descriptions of second-hand books, cars, knowledge, etc.)