The following is a list of FIPS two-letter codes for independent states (including the Republic of China (Taiwan), North Korea, and other states not recognized by the US). There are also codes for dependent territories, but these are not listed here. The standard also includes codes for the top-level subdivision of the countries, similar but usually incompatible with the ISO 3166-2 standard.
AC Antigua and Barbuda AF Islamic State of Afghanistan AG Democratic and Popular Republic of Algeria AJ Republic of Azerbaijan AL Republic of Albania AM Republic of Armenia AN Principality of Andorra AO Republic of Angola AR Argentine Republic AS Commonwealth of Australia AU Republic of Austria BA State of Bahrain BB Barbados BC Republic of Botswana BE Kingdom of Belgium BF Commonwealth of The Bahamas BG People's Republic of Bangladesh BH Belize BK Bosnia and Herzegovina BL Republic of Bolivia BM Union of Burma BN Republic of Benin BO Republic of Belarus BP Solomon Islands BR Federative Republic of Brazil BT Kingdom of Bhutan BU Republic of Bulgaria BX Negara Brunei Darussalam BY Republic of Burundi CA Canada CB Kingdom of Cambodia CD Republic of Chad CE Democratic Socialist Republic of Sri Lanka CF Republic of the Congo CG Democratic Republic of the Congo CH People's Republic of China CI Republic of Chile CM Republic of Cameroon CN Federal Islamic Republic of the Comoros CO Republic of Colombia CS Republic of Costa Rica CT Central African Republic CU Republic of Cuba CV Republic of Cape Verde CY Republic of Cyprus DA Kingdom of Denmark DJ Republic of Djibouti DO Commonwealth of Dominica DR Dominican Republic EC Republic of Ecuador EG Arab Republic of Egypt EI Republic of Ireland EK Republic of Equatorial Guinea EN Republic of Estonia ER State of Eritrea ES Republic of El Salvador ET Federal Democratic Republic of Ethiopia EZ Czech Republic FI Republic of Finland FJ Republic of the Fiji Islands FM Federated States of Micronesia FR French Republic GA Republic of The Gambia GB Gabonese Republic GG Republic of Georgia GH Republic of Ghana GJ Grenada GM Federal Republic of Germany GR Hellenic Republic GT Republic of Guatemala GV Republic of Guinea GY Co-operative Republic of Guyana HA Republic of Haiti HO Republic of Honduras HR Republic of Croatia HU Republic of Hungary IC Republic of Iceland ID Republic of Indonesia IN Republic of India IR Islamic Republic of Iran IS State of Israel IT Italian Republic IV Republic of Côte d'Ivoire IZ Republic of Iraq JA Japan JM Jamaica JO Hashemite Kingdom of Jordan KE Republic of Kenya KG Kyrgyz Republic KN Democratic People's Republic of Korea KR Republic of Kiribati KS Republic of Korea KU State of Kuwait KZ Republic of Kazakhstan LA Lao People's Democratic Republic LE Lebanese Republic LG Republic of Latvia LH Republic of Lithuania LI Republic of Liberia LO Slovak Republic LS Principality of Liechtenstein LT Kingdom of Lesotho LU Grand Duchy of Luxembourg LY Great Socialist People's Libyan Arab Jamahiriya MA Republic of Madagascar MD Republic of Moldova MG Mongolia MI Republic of Malawi MK Former Yugoslav Republic of Macedonia ML Republic of Mali MN Principality of Monaco MO Kingdom of Morocco MP Republic of Mauritius MR Islamic Republic of Mauritania MT Republic of Malta MU Sultanate of Oman MV Republic of Maldives MX United Mexican States MY Malaysia MZ Republic of Mozambique NG Republic of Niger NH Republic of Vanuatu NI Federal Republic of Nigeria NL Kingdom of the Netherlands NO Kingdom of Norway NP Kingdom of Nepal NR Republic of Nauru NS Republic of Suriname NU Republic of Nicaragua NZ New Zealand PA Republic of Paraguay PE Republic of Peru PK Islamic Republic of Pakistan PL Republic of Poland PM Republic of Panama PO Portuguese Republic PP Independent State of Papua New Guinea PS Republic of Palau PU Republic of Guinea-Bissau QA State of Qatar RM Republic of the Marshall Islands RO Romania RP Republic of the Philippines RS Russian Federation RW Rwandese Republic SA Kingdom of Saudi Arabia SC Federation of Saint Kitts and Nevis SE Republic of Seychelles SF Republic of South Africa SG Republic of Senegal SI Republic of Slovenia SL Republic of Sierra Leone SM Republic of San Marino SN Republic of Singapore SO Somalia SP Kingdom of Spain ST Saint Lucia SU Republic of the Sudan SW Kingdom of Sweden SY Syrian Arab Republic SZ Swiss Confederation TC United Arab Emirates TD Republic of Trinidad and Tobago TH Kingdom of Thailand TI Republic of Tajikistan TN Kingdom of Tonga TO Togolese Republic TP Democratic Republic of Sao Tome and Principe TS Republic of Tunisia TT East Timor (recent update: see FIPS publication number FIPS 104) TU Republic of Turkey TV Tuvalu TW Republic of China (Taiwan) TX Turkmenistan TZ United Republic of Tanzania UG Republic of Uganda UK United Kingdom of Great Britain and Northern Ireland UP Ukraine US United States of America UV Burkina Faso UY Oriental Republic of Uruguay UZ Republic of Uzbekistan VC Saint Vincent and the Grenadines VE Bolivarian Republic of Venezuela VM Socialist Republic of Vietnam VT Holy See WA Republic of Namibia WS Independent State of Samoa WZ Kingdom of Swaziland YI Serbia and Montenegro YM Republic of Yemen ZA Republic of Zambia ZI Republic of Zimbabwe
The complete standard can be found at [1], with Updates at [1].