This document discusses internet security software and provides examples of popular programs. It defines internet security software as protecting users' digital lives by blocking dangerous websites and guarding against identity theft. It then lists and describes several popular internet security programs, including McAfee Internet Security, Avast Internet Security 2015, and 360 Total Security. Finally, it outlines some of the key functions of internet security software, such as including antimalware, firewalls, parental controls, and identity theft protection.