Capital city from Geonames
Country's customary English short name (CLDR)
ISO 4217 currency alphabetic code
Country code from ITU-T recommendation E.164, sometimes followed by area code
Distinguishing signs of vehicles in international traffic
EDGAR country code from SEC
Codes assigned by the Fédération Internationale de Football Association
Codes from the U.S. standard FIPS PUB 10-4
Geoname ID
Codes assigned by the International Olympics Committee
Country status, based on the CIA World Factbook
Codes assigned by the International Telecommunications Union
Languages from Geonames, maps to the keys in the Language associative array. These can match the keys in the associative array received from getLanguages, also these can match ISO639.alpha3 or ISO639.alpha3Alternative.
Machine-Readable Cataloging codes from the Library of Congress
Top level domain from Geonames
Country abbreviations by the World Meteorological Organization