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| Category | Descriptions |
| Mail Order Brides | Sites featuring women seeking correspondence with potential mates living in different countries. |
| E-Personals | Sites with Personls, Penpal and Email facilities |
| Matchmakers | Sites offering matchmaking advice, consultations,and introductions. |
| National | North American Sites serving a National client base. |
| Regional | North American Sites with a non-national client base, serving residents of distinct regions, states, cities or localities. |
| Overseas | Sites located outside North America |
| Religious/Ethnic | Sites serving singles of a particular religious or ethnic group |
| Romance | Sites on Love and Romance |
| Adult | Sites with explicit language, content and/or nudity. NOT suitable for Minors, NOT suitable for those who find such materials objectionable. |
| Alternative | Sites for singles practicing an Alternative Lifestyle. |
| Advice | Sites offering advice, books, magazines, games, entertainment |
| Link | Sites providing links to other singles sites |
| One & Only Network | Associate Sites of the One & Only Personals Network |
| Travel | Sites providing travel and travel related services especially for singles. |
| 900 Phone | Sites with toll call (900) telephone service |