AC - Ascension Island
AD - Andorra
AE - United Arab Emirates
AF - Afghanistan
AG - Antigua and Barbuda
AI - Anguilla
AL - Albania
AM - Armenia
AN - Netherlands Antilles
AO - Angola
AQ - Antarctica
AR - Argentina
AS - American Samoa
AT - Austria
AU - Australia
AW - Aruba
AX - Aland Islands
AZ - Azerbaijan
BA - Bosnia and Herzegovina
BB - Barbados
BD - Bangladesh
BE - Belgium
BF - Burkina Faso
BG - Bulgaria
BH - Bahrain
BI - Burundi
BJ - Benin
BM - Bermuda
BN - Brunei Darussalam
BO - Bolivia
BR - Brazil
BS - Bahamas
BT - Bhutan
BV - Bouvet Island
BW - Botswana
BY - Belarus
BZ - Belize
CA - Canada
CC - Cocos (Keeling) Islands
CD - Congo, Democratic Republic
CF - Central African Republic
CG - Congo
CH - Switzerland
CI - Cote D'Ivoire (Ivory Coast)
CK - Cook Islands
CL - Chile
CM - Cameroon
CN - China
CO - Colombia
CR - Costa Rica
CS - Czechoslovakia (former)
CU - Cuba
CV - Cape Verde
CX - Christmas Island
CY - Cyprus
CZ - Czech Republic
DE - Germany
DJ - Djibouti
DK - Denmark
DM - Dominica
DO - Dominican Republic
DZ - Algeria
EC - Ecuador
EE - Estonia
EG - Egypt
EH - Western Sahara
ER - Eritrea
ES - Spain
ET - Ethiopia
EU - European Union
FI - Finland
FJ - Fiji
FK - Falkland Islands (Malvinas)
FM - Micronesia
FO - Faroe Islands
FR - France
FX - France, Metropolitan
GA - Gabon
GB - Great Britain (UK)
GD - Grenada
GE - Georgia
GF - French Guiana
GG - Guernsey
GH - Ghana
GI - Gibraltar
GL - Greenland
GM - Gambia
GN - Guinea
GP - Guadeloupe
GQ - Equatorial Guinea
GR - Greece
GS - S. Georgia and S. Sandwich Isls.
GT - Guatemala
GU - Guam
GW - Guinea-Bissau
GY - Guyana
HK - Hong Kong
HM - Heard and McDonald Islands
HN - Honduras
HR - Croatia (Hrvatska)
HT - Haiti
HU - Hungary
ID - Indonesia
IE - Ireland
IL - Israel
IM - Isle of Man
IN - India
IO - British Indian Ocean Territory
IQ - Iraq
IR - Iran
IS - Iceland
IT - Italy
JE - Jersey
JM - Jamaica
JO - Jordan
JP - Japan
KE - Kenya
KG - Kyrgyzstan
KH - Cambodia
KI - Kiribati
KM - Comoros
KN - Saint Kitts and Nevis
KP - Korea (North)
KR - Korea (South)
KW - Kuwait
KY - Cayman Islands
KZ - Kazakhstan
LA - Laos
LB - Lebanon
LC - Saint Lucia
LI - Liechtenstein
LK - Sri Lanka
LR - Liberia
LS - Lesotho
LT - Lithuania
LU - Luxembourg
LV - Latvia
LY - Libya
MA - Morocco
MC - Monaco
MD - Moldova
ME - Montenegro
MG - Madagascar
MH - Marshall Islands
MK - F.Y.R.O.M. (Macedonia)
ML - Mali
MM - Myanmar
MN - Mongolia
MO - Macau
MP - Northern Mariana Islands
MQ - Martinique
MR - Mauritania
MS - Montserrat
MT - Malta
MU - Mauritius
MV - Maldives
MW - Malawi
MX - Mexico
MY - Malaysia
MZ - Mozambique
NA - Namibia
NC - New Caledonia
NE - Niger
NF - Norfolk Island
NG - Nigeria
NI - Nicaragua
NL - Netherlands
NO - Norway
NP - Nepal
NR - Nauru
NT - Neutral Zone
NU - Niue
NZ - New Zealand (Aotearoa)
OM - Oman
PA - Panama
PE - Peru
PF - French Polynesia
PG - Papua New Guinea
PH - Philippines
PK - Pakistan
PL - Poland
PM - St. Pierre and Miquelon
PN - Pitcairn
PR - Puerto Rico
PS - Palestinian Territory, Occupied
PT - Portugal
PW - Palau
PY - Paraguay
QA - Qatar
RE - Reunion
RS - Serbia
RO - Romania
RU - Russian Federation
RW - Rwanda
SA - Saudi Arabia
SB - Solomon Islands
SC - Seychelles
SD - Sudan
SE - Sweden
SG - Singapore
SH - St. Helena
SI - Slovenia
SJ - Svalbard & Jan Mayen Islands
SK - Slovak Republic
SL - Sierra Leone
SM - San Marino
SN - Senegal
SO - Somalia
SR - Suriname
ST - Sao Tome and Principe
SU - USSR (former)
SV - El Salvador
SY - Syria
SZ - Swaziland
TC - Turks and Caicos Islands
TD - Chad
TF - French Southern Territories
TG - Togo
TH - Thailand
TJ - Tajikistan
TK - Tokelau
TM - Turkmenistan
TN - Tunisia
TO - Tonga
TP - East Timor
TR - Turkey
TT - Trinidad and Tobago
TV - Tuvalu
TW - Taiwan
TZ - Tanzania
UA - Ukraine
UG - Uganda
UK - United Kingdom
UM - US Minor Outlying Islands
US - United States
UY - Uruguay
UZ - Uzbekistan
VA - Vatican City State (Holy See)
VC - Saint Vincent & the Grenadines
VE - Venezuela
VG - British Virgin Islands
VI - Virgin Islands (U.S.)
VN - Viet Nam
VU - Vanuatu
WF - Wallis and Futuna Islands
FA - Farsi
DA - Danish
JA - Japanese
HE - Herbew
KO - Korean
HI - Hindi
UR - Urdu
SQ - Albanian
NL-BE - Dutch (Belgium)
WS - Samoa
YE - Yemen
YT - Mayotte
YU - Serbia and Montenegro (former Yugoslavia)
ZA - South Africa
ZM - Zambia
ZR - Zaire - See CD Congo, Democratic Republic
ZW - Zimbabwe 
ARPA - Old style Arpanet
AERO - Air-transport industry
BIZ - Business
CAT - Websites in the Catalan language or related to Catalan culture.
COOP - The .COOP is limited to cooperatives as defined by the Rochdale Principles.
COM - Commercial/Company
EDU - US Educational
EU - European Union
GOV - US Government
INFO - Information
INT - International Organization
JOBS - Companies
MIL - US Military
MOBI - Must be used for mobile-compatible sites in accordance with standards.
MUSEUM - Must be verified as a legitimate museum.
NAME - Individuals, by name
NATO - Nato field
NET - Network
ORG - Non-Profit Organization
PRO - .PRO is reserved for licensed doctors, attorneys, and certified public accountants only.
TRAVEL - Travel and travel-agency related sites 
ALF - Alien Life Form
ART - Alternate Reality Thoughtform
CCC - Common Cosmic Consciousness
CIP - Child's Imaginary Playmate
ICK - Icky Person
JRK - Jerks
MDC - Multi-Dimensional Creature
POL - Politicians (sub-category of ALF)
VME - Vegetarian Meat Eaters
ZH - Chinese
ZH-TW - Chinese (Traditional, Taiwan)
ZH-CN - Chinese (Simplified, PRC)
ZH-CHS - Chinese (Simplified)
ZH-CHT - Chinese (Traditional)
ZH-HK - Chinese (Traditional, Hong Kong S.A.R.)
ZH-SG - Chinese (Simplified, Singapore)
ZH-MO - Chinese (Traditional, Macao S.A.R.)
EN - English
EL - Greek
AR-SA - Arabic (Saudi Arabia)
AR-EG - Arabic (Egypt)
AR-LY - Arabic (Libya)
AR-DZ - Arabic (Algeria)
AR-MA - Arabic (Morocco)
AR-TN - Arabic (Tunisia)
AR-OM - Arabic (Oman)
AR-YE - Arabic (Yemen)
AR-SY - Arabic (Syria)
AR-JO - Arabic (Jordan)
AR-LB - Arabic (Lebanon)
AR-KW - Arabic (Kuwait)
AR-AE - Arabic (U.A.E.)
AR-BH - Arabic (Bahrain)
AR-QA - Arabic (Qatar)
EN-US - English (United States)
EN-GB - English (United Kingdom)
EN-AU - English (Australia)
EN-CA - English (Canada)
EN-NZ - English (New Zealand)
EN-IE - English (Ireland)
EN-ZA - English (South Africa)
EN-JM - English (Jamaica)
EN-BZ - English (Belize)
EN-TT - English (Trinidad)
FR-BE - French (Belgium)
FR-CA - French (Canada)
FR-CH - French (Switzerland)
FR-LU - French (Luxembourg)
DE-CH - German (Switzerland)
DE-AT - German (Austria)
DE-LU - German (Luxembourg)
DE-LI - German (Liechtenstein)
IT-CH - Italian (Switzerland)
PT-BR - Portuguese (Brazil)
RM - Rhaeto-Romanic
RO-MO - Romanian (Republic of Moldova)
RU-MO - Russian (Republic of Moldova)
ES-MX - Spanish (Mexico)
ES-GT - Spanish (Guatemala)
ES-CR - Spanish (Costa Rica)
ES-PA - Spanish (Panama)
ES-DO - Spanish (Dominican Republic)
ES-VE - Spanish (Venezuela)
ES-CO - Spanish (Colombia)
ES-PE - Spanish (Peru)
ES-AR - Spanish (Argentina)
ES-EC - Spanish (Ecuador)
ES-CL - Spanish (Chile)
ES-UG - Spanish (Uruguay)
ES-PY - Spanish (Paraguay)
ES-BO - Spanish (Bolivia)
ES-SV - Spanish (El Salvador)
ES-HV - Spanish (Honduras)
ES-NI - Spanish (Nicaragua)
ES-PR - Spanish (Puerto Rico)
SX - Sutu
SV-FI - Swedish (Finland)
TS - Tsonga
XH - Xhosa
JI - Yiddish
ZU - Zulu