W3

W3 or W-3 may refer to:

W3, a postcode district in the W postcode area
PZL W-3 Sokół, a Polish helicopter
The Amazing 3, a manga and anime series, known in Japan as Wonder 3
Webster's Third New International Dictionary, the 1961 edition of Webster's Dictionary
Flyhy Cargo Airlines, IATA code W3
The U.S. Internal Revenue Service form W-3, a transmittal form for W-2 information.
W3, a pay grade of public-service scientists in German universities
4th step of the W0-W6 scale for the classification of meteorites by weathering

World Wide Web (www)

World Wide Web, a system of interlinked hypertext documents accessed via the Internet
World Wide Web Conference (WWW), a yearly international academic conference on the topic of the future direction of the World Wide Web
WorldWideWeb, the first web browser and editor
World Wide Web Consortium, also known as W3C and W3.org, the main international standards organization for the World Wide Web

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
Wolfenstein 3D, the third game in the Wolfenstein series