Codes for Internationalization

• ISO’s list of Maintenance Agencies and Registration Authorities

ISO TC46 Country codes

• ISO 3166 Maintenance Agency Official. They don't give the long country names away for free, however.
  
• ISO 3166-1 -- Code for the representation of names of countries Technical contents. Unofficial.
  
• ISO 3166-1 -- Code pour la représentation des noms de pays Contenu technique. Pas officiel.

• UN/LOCODE United Nations Code for Trade and Transport Locations
• The Airline Codes Web Site

ISO TC46/WG3 Script codes

• ISO 15924 -- Code for the representation of names of scripts.

• ISO 9 -- Transliteration of Cyrillic. Home Page for the revision of the International Standard ISO 9. Project Leader: Ralph Cleminson. Project Editor: Michael Everson.

ISO TC46/SC4 and ISO TC37/SC2 Language codes and associated language subtags

• ISO 639:1988 and ISO 639-2:1998 -- Codes for the representation of names of languages Official site.
• Changes to ISO 639:1988 and 639-2:1998 An aid to tracking changes in the standards. Official site.
• ISO 639-3:2006 -- Codes for the representation of names of languages Official site.
• RFC 4646 -- Language code assignments at the IETF site.
• The Language Subtag Registry.
• Registration forms for the language subtags.
• The IETF-Languages list, for people who have read this far and might want to propose a subtag
• Implementing the ISO 639-2 code for Sign Languages with RFC 3066. (These are to be deprecated in favour of ISO 639-3 codes.)

ISO TC68 Currency codes

• ISO 4217 -- Currency and funds code Link to the official ISO 4217 Maintenance Agency web page. Official.
• ISO 4217 -- Cód airgeadra agus cistí. Leagan Gaeilge, bunaithe ar an leagan oifigiúil Béarla. Idir lámha.