W2

W2, W-2, or w2 may refer to:


 * W2 (tram), a class of electric trams built by the Melbourne & Metropolitan Tramways Board
 * W2, the Welsh version of television station BBC Two
 * W2, one of four manuscripts of the Magnus Liber
 * W2, a postcode district in the W postcode area of the United Kingdom
 * w2 Concertzaal, a pop stage in 's-Hertogenbosch, The Netherlands
 * W-2 tool steel, a water-hardening variety of high carbon steel
 * Apple W2, a wireless chip used in the Apple Watch Series 3
 * Arado W 2, a two-seat twin-engine seaplane trainer
 * British NVC community W2, a Woodland and scrub community in the British National Vegetation Classification system
 * Form W-2, a United States federal tax form issued by employers and stating how much an employee was paid in a year
 * The Vector W2, a concept car
 * Wisconsin Works, a workforce development and welfare replacement program in Wisconsin (a form of Workfare)
 * Perfect World (video game), also known as PW and World2, 3D MMORPG game
 * Webster's New International Dictionary, Second Edition
 * Third step of the W0-W6 scale for the classification of meteorites by weathering
 * Windows 2.0x, a Microsoft operating system