Internet Governance Glossary
2.31 Country code top-level-domain / ccTLD
top-level-domain (TLD) which designates a specific country or special area of geographical interest, such as .uk (United Kingdom), .cn (China), .in (India).
ccTLD are managed according to the international standard ISO 3166 (multipart) “Codes for the representation of names of countries and their subdivisions”. Some ccTLD are still managed by a variety of institutions or individuals that received accreditation in the early days of the Internet, when some governments were not all that interested in such matters.