The NATO CODIFICATION SYSTEM - NCS - Codes chart - January 2008
http://www.nato.int/structur/AC/135/main/pdf/NCS_codes_chart.pdf

NATO Codification System Country Codes - January 2008
Unique ISO 3166-1 “3-letter” codes to be used within NATO to distinguish geographical entities, nations and countries, whenever necessary (published in STANAG 1059)

(attention : FYR (fYROM) instead of MKD *)

http://www.nato.int/structur/AC/135/main/links/codsp3-alt.htm

*Turkey recognizes the Republic of Macedonia with its constitutional name