Warez: (pronounced as "wares" or possibly by some pronounced like the city of "Juarez") is a term used by software "pirates" to describe software that has been stripped of its copy-protection and made available on the Internet for downloading. People who create warez sites sometimes call them "warez sitez" and use "z" in other pluralizations.

Whitemail: The dissemination of false information for financial gain via e-mail.

WinNuke: See 'blue bomb'

Worm: A program that makes copies of itself elsewhere in a computing system. These copies may be created on the same computer, or may be sent over networks to other computers. The first use of the term described a program that copied itself benignly around a network, using otherwise-unused resources on networked machines to perform distributed computation. Some worms are security threats, using networks to spread themselves against the wishes of the system owners and disrupting networks by overloading them.