Circumventor Sites: Parallel websites that allow children to get around filtering software and access sites that have been blocked.Closed Systems: A limited network of sites that are rated and categorized by maturity level and quality.Despite the critical need for measures to protect children from accessing harmful materials, the law was immediately challenged and blocked by lower courts, and has become the subject of an epic legal battle, still raging today.

These are online sites that allow users to post comments on a particular issue.

Domain name: The part of an Internet address to the right of the final dot used to identify the type of organization using the server, such as or

Cyberstalking: Methods individuals use to track, lure, or harass another person online.

Discussion Boards: Also called Internet forums, message boards, and bulletin boards.

Download: To copy a file from one computer system to another via the Internet (usually your computer or mobile device).

Electronic Footprint: computers maintain a record of all website visits and e-mail messages, leaving a trail of the user’s activity in cyberspace.

COPA: The Child Online Protection Act (COPA) of 1998 was an effort by the U. Congress to modify the CDA in response to the Supreme Court’s decision in Reno v. The law sought to make it a crime for commercial websites to make pornographic material that is “harmful to minors” available to juveniles.

The purpose of COPA was to protect children from instant access to pornographic “teaser images” on porn syndicate web pages, by requiring pornographers to take credit card numbers, adult verification numbers, or access codes to restrict children’s access to pornographic material and to allow access to this material for consenting adults only.

File sharing sometimes is used illegally to download music or software.