Similar to 契約者固有ID

.tw

Typepad

.ua

.ug

.uk

Urchin (software)

.uy

.uz

.vc

.ve

.vg

Virtual private network

Visual.ly

.vn

.vu

Vyatta

VyOS

Web Accessibility Initiative

Web application firewall

Web Proxy Auto-Discovery Protocol

Web 2.0

Web GIS

Webmention

WebSocket