There are originally 7 domain names classified by organization: com (commercial organization), net (network service organization), gov (government organization), mil (military organization), org (non-profit organization), edu (education department), int (international institutions).

In 1997, seven more top-level standard domain names were added: firm (enterprises and companies), store (commercial enterprises), web (entities engaged in WEB-related businesses), arts (entities engaged in culture and entertainment) ), REC (entity engaged in leisure and entertainment industry), info (entity engaged in information service industry), nom (individual engaged in personal activities, publishing personal information).