W3 or W-3 may refer to:

  • W3 (tram), a class of electric trams built by the Melbourne & Metropolitan Tramways Board
  • W3, a postcode district in the W postcode area
  • Apple W3, a wireless chip used in the Apple Watch Series 4.
  • PZL W-3 Sokół, a Polish helicopter
  • The Amazing 3, a manga and anime series, known in Japan as Wonder 3
  • Arik Air, which has IATA code W3
  • The fourth step of the W0-W6 scale for the classification of meteorites by weathering
  • The U.S. Internal Revenue Service form W-3, a transmittal form for Form W-2 information
  • Webster's Third New International Dictionary, the 1961 edition of Webster's Dictionary
  • The World Wide Web, abbreviated 'W3' on the earliest web pages
  • World Wide Web Consortium, international standards organization for the World Wide Web (abbreviated WWW or W3)
  • Windows 3.0, a Microsoft operating system

Video games

  • Warcraft III: Reign of Chaos, the third game in the Warcraft series.
  • Worms & Reinforcements United, a game bundle composing the first Worms game and the Worms Reinforcements expansion pack
  • Wiedźmin 3: Dziki Gon, the original name of the Polish video game The Witcher 3: Wild Hunt

See also

  • WWW (disambiguation)
  • 3W (disambiguation)
  • 3 (disambiguation)
  • W (disambiguation)
  • Web development tools