Ads - Sites that host online advertisements, which include advertising graphics, banners, and pop-up content.

Alcohol - Sites that promote or sell alcohol.

Anonymizer - Sites with tools that can proxy bypass information or services.

Art - Sites for Theater, museums, exhibits, photography, and digital graphic resources.

Autos - Sites about automobiles, including manufacturers, news, reviews and hobbyist information.

Business - Sites for businesses of all sizes, especially company Web sites.

Chat - Sites where you can chat in real-time with groups of people.

Compromised - Valid Web sites that have been hacked and are distributing malware attacks.

Criminal - Sites that promote software hacking or encourage activities that are illegal, criminal, or harmful to the general public. 

Dating - Sites for meeting other people.

Download - Sites that offer shareware, freeware, and other legal software downloads.

Drugs - Sites about illegal or recreational drug use.

Education - Sites for educational materials and schools, covering all age levels and types.

Finance - Sites for banks, brokerages, trusts, and other financial organizations.

Food - Sites about food, dining, catering services, food critics, restaurant reservation, and restaurant review sites.

Forums - Sites with discussions, bulletin boards, message boards, and forums.

Gambling - Sites that offer gambling or information about gambling.

Games - Sites that offer playable games or information about games.

Government - Sites operated by government agencies, including city, state, regional, county and federal levels.

Hate - Sites that promote prejudice based on gender, age, race, nationality, religion, sexual orientation, etc.

Health - Sites that offer information about health care or health services.

Home - Sites about home improvement, decorating, family, pets, gardening, cooking, event planning (non-wedding) and hobbies.

Humor - Sites that are intended to be funny or humorous.

Jobs - Sites that offer job listings, resume services, interview coaching and similar employment-related services.

Malware - Sites or software that installs on a user's computer with the intent to collect information or make system changes without the user's consent.

Media - Sites that stream TV shows, videos, or movies.

Military - Sites sponsored or devoted to the armed forces and government-controlled agencies.

Miscellaneous - Web sites that do not fall into any of the other categories.

Music - Sites about Internet radio, streaming media, musicians, bands, and MP3 download sites.

News - Sites that offer news and information, including newspapers, broadcasters and other publishers.

Non-profits - Sites for non-profit or charity organizations and services.

Nudity - Web sites that provide images or descriptions of nudity.

Personal - Sites about or hosted by personal individuals. Includes personal blogs, guestbook servers, personal hobbies, activities, etc.

Pharmacy - Sites that provide information about approved drugs and their medical uses.

Phishing - Sites that pretend to be legitimate business sites while obtaining private information from users.  

Politics - Sites that support politics and provide political party information, including elections or legislation. 

Pornography - Sites that contain any depiction of pornography.

Portal - Sites that offer an entry to the Internet, including bundled services on their own site.

Real Estate - Sites that post real estate listings and promote real estate agents/brokers.

Religion - Sites about religion, religious teachings and groups, and spirituality.

Search Engines - Sites that display result listings based on keywords.

Shopping - Sites that sell products and services online.

Social Network - Sites that promote interaction and networking between people.

Spam - Web site links found inside spammed e-mails are automatically added to this list.

Sports - Sites about sports of all kinds, from professional to amateur, from news to league information and schedules.

Tasteless - Sites that contain offensive and tasteless information on controversial subjects.

Technology - Sites about computing, hardware and technology, including news, information, code and vendor information.

Tobacco - Sites that promote or sell all tobacco products.

Translator - Sites that offer language translations.

Travel - Sites with travel information and services, including reservations for airlines, cars, hotels, vacations, and trips.

Violence - Sites that promote violence and sedition. 

Weapons - Sites about weapons, commercial and otherwise.

Webmail - Sites that offer the ability to send or receive email.