known algorithm for deriving prefix codes. Prefix codes are widely referred to as "Huffman codes" even when the code was not produced by a Huffman algorithm...

Country calling codes, country dial-in codes, international subscriber dialing (ISD) codes, or most commonly, telephone country codes are telephone number...

Codes. In 1983, the U.S. Postal Service introduced an expanded ZIP Code system that it named ZIP+4, often known as "plus-four codes", "add-on codes"...

these cases the NPC codes matches the IOC codes shown above. The two current NPCs without a corresponding NOC use the following NPC codes. Fourteen historical...

standard – Codes for the representation of names of countries and their subdivisions. The ISO 3166 standard contains three parts: ISO 3166-1 – Codes for the...

This is a list of observatory codes (IAU codes or MPC codes) published by the Minor Planet Center. For a detailed description, see observations of small...

which require the use of a postal code. Although postal codes are usually assigned to geographical areas, special codes are sometimes assigned to individual...

Information Manual and the codes themselves are described in IATA's Airline Coding Directory. (Both are published semiannually.) The IATA codes were originally based...

administrations have their own list of codes for their stations, such as the list of Amtrak station codes. Airport codes arose out of the convenience that...

the standard is Codes for the representation of names of countries and their subdivisions. It consists of three parts: ISO 3166-1, Codes for the representation...