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. 

The Domain Name System (DNS) is a hierarchical and distributed name service that provides a naming system for computers, services, and other resources on the Internet or other Internet Protocol (IP) networks. The Domain Name System has been an essential component of the functionality of the Internet since 1985.

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March 19, 1986

March 19, 1986

March 5, 1986

March 3, 1986

January 17, 1986

January 9, 1986

November 7, 1985