ISBN
Book identifier
10 or 13 charactersReference
Common Identifier Guide.
A quick reference for the codes and identifiers used across books, products, airports, vehicles, postal addresses, geography and countries.
UPC-A
Retail barcode
12 digitsEAN-13
International retail barcode
13 digitsEAN-8
Compact retail barcode
8 digitsIATA
Airport code
3 lettersICAO
Airport code
4 lettersVIN
Vehicle identifier
17 charactersZIP code
U.S. postal code
5 digitsFIPS
Government geographic identifier
VariesISO alpha-2
Country code
2 lettersISO alpha-3
Country code
3 letters