| Adult | Sites that do not necessarily have sexual content, but are still unsuitable for general viewing |
| Advertisments | Sites used for advertising, usually banner advertisements |
| Alcohol | Sites relating to either the sale or consumption of alcohol |
| Anonymous Proxies | Sites that allow users to circumvent filtering systems |
| Arts & Entertainment | Sites related to music, films, books, and other sorts of entertainment |
| Betting & Gambling | Settings providing betting and gambling services |
| Bulletin Boards & Forums | Sites that run bulletin boards or forums |
| Chat Rooms | Sites that allow users to chat in real time with other people |
| Computing & Internet | Sites that cover computing and internet-related topics of all types |
| Criminal Skills | Sites that give information on how to commit criminal acts |
| Dating & Personal Ads | Sites providing personals and dating services |
| Drugs | Sites relating to the sale or consumption of illegal substances, and related paraphernalia.
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| Drugs, Alcohol & Tobacco | Sites generally related to drugs, alcohol and tobacco |
| Finance & Investment | Sites relating to investment and the financial markets |
| Food & Drink | Sites relating to food and drink, i.e. cookery sites |
| Free Sites | Sites that let people build their own websites for free |
| Games | Sites containging online games, or sites giving reviews of games |
| Glamour & Intimate Apparel | Sites relating to glamour magazines and beauty products |
| Government & Politics | Government and government departmental sites, and sites relating to political parties |
| Hacking | Sites relating to hacking, and other illegal or immoral computer practises |
| Hate Speech | Sites promoting extreme views that many people may find offensive |
| Health & Medicine | Sites related to medical practices, or to medicine in general |
| Hobbies & Recreation | Personal sites, or sites related to hobbies and interests |
| Hosting Providers | Sites providing hosting services to other people |
| Image Searching | Sites allowing users to search for images by keywords |
| Jobs and Employment | Sites providing job listings and employment services |
| Kids | Sites aimed specifically at children |
| Lifestyle & Culture | Sites relating to lifestyle and culture |
| News | Sites providing news services |
| Pornography | Sites of an adult sexual nature |
| Property & Estate | Sites relating to property, and the sale of property and real estate |
| Reference | Reference sites, such as online dictionaries and encyclopedias |
| Religion | Sites of a religious nature |
| Schools & Education | School, college and other educational institution websites, and other sites with educational material |
| Search Engines | Sites offering web searching capabilities |
| Sex Education | Sites relating to sex education, but not of an adult nature |
| Sexually Explicit | Sites of a sexually explicit nature |
| Shopping | Sites offering the ability to shop online |
| Spam source | Website in this category are well known for producing spam. |
| Sports | Sites relating to sports of all kinds, including sports clubs, fan sites and sports news |
| Streaming Media | Sites providing streaming content |
| Tobacco | Sites relating to the sale or use of tobacco and tobacco-related products |
| Travel & Tourism | Sites of a tourist nature, such as airlines, travel agents and travel guides |
| Usenet | Sites providing newsgroup access and services |
| Vehicles & Transport | Sites related to vehicles and other forms of transport |
| Violence & Weapons | Sites giving information on weapons and their use, and violent acts in general |
| Web-based E-Mail | Sites offering web-based e-mail services |
