Editing Country code (section)

===Transport===
* '''[[International vehicle registration code]]s''', under the 1949 [[Geneva Convention on Road Traffic]] and the 1968 [[Vienna Convention on Road Traffic]] to identify the country that issued a motor vehicle's [[vehicle registration plate]].
** After the [[Enlargement of the European Union|2004 EU enlargement]], the EU began instead using the ISO 3166-1 alpha-2 code for license plate codes, but with two modifications: EL for Greece (instead of GR) and (formerly) UK for United Kingdom (instead of GB)[https://web.archive.org/web/20190628014602/https://ec.europa.eu/eurostat/statistics-explained/pdfscache/4904.pdf]
** [[Diplomatic license plates in the United States]], issued by the [[United States Department of State|U.S. State Department]] to accredited diplomats, include a two-letter country code to identify that representative's country.
* '''[[List of aircraft registration prefixes|ICAO aircraft registration prefixes]]''', defined by the [[International Civil Aviation Organization]] (ICAO) to identify an aircraft's country of registration.
* '''[[ICAO airport code]] prefixes''', defined by the ICAO to identify an airport's country.
* '''[[List of UIC country codes|UIC country codes]]''', to identify members of the [[International Union of Railways]] (UIC).