W3

W3 or W-3 may refer to:

* World Wide Web
* London W3, the postal code for the Acton area of London
* 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"
* Flyhy Cargo Airlines, IATA code W3

ee also