The Internet domain structure
In the United States, the Internet domain name space is divided into several
organizational and geographical top-level domains. Other countries follow
In the US, some of the top-level domains include:
Geographical domains follow the standard ISO 3166, which contains
abbreviations for each country (for example, ca, ch,
it, for Canada, Switzerland, and Italy, respectively).
Registering a domain name
DNS domain and hostnames
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SCO OpenServer Release 5.0.7 -- 11 February 2003