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More generally, the restriction (or domain restriction or left-restriction) of a binary relation between and may be defined as a relation having domain , codomain and graph ( ) = {(,) ():}. Similarly, one can define a right-restriction or range restriction R B . {\displaystyle R\triangleright B.}
This is a list of the oldest extant registered generic top-level domains used in the Domain Name System of the Internet. Until late February 1986, Domain Registration was limited to organizations with access to ARPA. Public registration was revealed on Usenet on February 24, 1986. [1]
In 1999 an article in Mother Earth News quoted an authority on distance education as saying, "Anyone who has the necessary $70 can register an edu domain name and use it to archive any type of enterprise on the Internet." [10] In 2001, the domain was restricted to U.S.-accredited postsecondary educational institutions. [3]
This list of Internet top-level domains (TLD) contains top-level domains, which are those domains in the DNS root zone of the Domain Name System of the Internet.A list of the top-level domains by the Internet Assigned Numbers Authority (IANA) is maintained at the Root Zone Database. [1]
Generic top-level domains (gTLDs) are one of the categories of top-level domains (TLDs) maintained by the Internet Assigned Numbers Authority (IANA) for use in the Domain Name System of the Internet. A top-level domain is the last level of every fully qualified domain name. They are called generic for historical reasons; initially, they were ...
The domain name gov is a sponsored top-level domain (sTLD) in the Domain Name System of the Internet.The name is derived from the word government, indicating its restricted use by government entities.
Sometimes a hyperlink can be displayed as an AOL link in an email when in fact the destination URL is to a malicious domain. • Be careful when authorizing an app to access your account or when providing any third-party access to your account info.
A country code top-level domain ... is an exceptionally reserved ISO 3166-1 code. Restricted to legal and natural persons in European Union member states.