Definition: Software installed on computers (usually without the user's permission) used to track an Internet user's surfing habits.
Also Known As: malware, virus
Spyware
From Gregory Go, for About.com
Elsewhere on the Web
Explore Online Business / Hosting
Must Reads
About.com Special Features
Start your new business on the right foot with these helpful tips. More >
Easy steps to take control of your credit card debt. More >
©2009 About.com, a part of The New York Times Company.
All rights reserved.