(The following information provided by Beijing invees Network science and technology Co.,Ltd)The first category called "category domain name (generic Top-Level Domain, the acronym for the gTLD)," a total of 21 have been approved by ICANN can be registered for use. science and technology

         Below is divided into three sub-categories:
         1, support organizations like domain (sponsored domain names): A total of 13, that is. AERO,. ASIA,. CAT,. COOP, and. EDU,. GOV,. INT,. JOBS,. MIL,. MOBI,. MUSEUM,. TEL,. TRAVEL Beijing invees Network science and technology Co.,Ltd
         2, domain names based organizations (infrastructure domain names): Only one, that is,. ARPA
         3, category domain name (generic domain names), a total of seven. It consists of unrestricted / restricted (generic-restricted) registered two sub-sub-category.
       (1) unrestricted categories (generic) four domains:. COM,. INFO,. NET,. ORG
       (2) restricted category (generic-restricted) three domains:. BIZ,. NAME,. PRO
(Beijing invees Network science and technology Co.,Ltd)