A

• [+] ICAO airport designator (27 P)

C

• [+] Country codes (41 P)

F

• [+] FIPS 10 (13 P)

G

• [+] Geographic coordinate lists (3355 C, 3822 P)

G cont.

• [+] Geolocation (1 C, 53 P)

I

• [+] IATA airport designator (26 P)
• [+] ISO 3166 (1 C, 252 P)

L

• [+] Lists of postal codes (2 C, 58 P)

N

• [+] NUTS (5 C, 37 P)

T

• [+] Telephone numbers by country (18 C, 134 P)

U

• [+] UN/LOCODE (1 C, 4 P)

• Geocoding

A

• Airport code

B

• BC Geographical Names Information System

C

• C-squares
• Chapman code
• CLLI code
• Community Identification Number
• Country code

F

• Federal Geographic Data Committee
• Federal Information Processing Standard state code
• FIPS 10

G

• GEOnet Names Server
• Geo-imputation
• GeoNames

G cont.

• Geocode
• Geographic coordinate system
• Geographic Names Information System
• Geographical Names Board of Canada
• Geohash
• Geoparsing
• Geotagging
• Grid (spatial index)

I

• List of IATA-indexed railway stations
• International Air Transport Association airport code
• International Civil Aviation Organization airport code

M

• Marsden square

N

• Natural Area Code
• Nomenclature of Territorial Units for Statistics

O

• ONS coding system

P

• List of postal codes

Q

• QDGC

R

• Reverse geocoding

S

• Standard Geographical Classification code (Canada)
• Standard Interchange Format

T

• Transverse Mercator projection

U

• UBIGEO
• UN M.49
• UN/LOCODE
• Unique Feature Identifier
• United States Board on Geographic Names

W

• World Meteorological Organization squares