A set of links to maps showing how the Internet is connected. Includes some nice examples right on the page. Unfortunately, this site is old so most of the links do not work.
At the moment, this is free. It is an animation showing how computer viruses work.
Good basic pages on spyware from the folks at Webroot.
Check out what the Webroot Threat Research team has uncovered about spyware and how it operates.
Quickly learn how to avoid online dangers so you can confidently use the Internet again.
Comprehensive discussion about computer virii. A little advanced. No illustrations or activities.