Short for top-level domain, and refers to the suffix attached to Internetdomain names. There are a limited number of predefined suffixes, and each one represent a top-level domain. Current top-level domains include:
Internet Council of Registrars (CORE) Home page of CORE, a non-profit organization founded as result of a plan initiated by the Internet Society (ISOC) and the Internet Assigned Numbers Authority (IANA) in Fall 1996 to add new structure, free enterprise and competition to the Internet Domain Name System (DNS) when the old monopoly on .com, .org and .net ends in 1998.
Top-Level Domain Name Resources Contains a list of two-letter top level domains, current root servers, and a comprehensive list of domain name registries around the world. Also includes information on the top-level domain controversy and domain name disputes.