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"...

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...

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...

ZIP codes (1870 to 1875); Calamba (Laguna), Cavite City, Dasmariñas, Mabalacat, Mariveles, and the Island Garden City of Samal with 3 ZIP codes each;...

International code and the four unique Gerke codes into the local alphabet, hence Greek, Hebrew, Russian, and Ukrainian Morse codes. If more codes are needed...

Various countries have adopted different codes. For example, the table below shows the polymer resin (plastic) codes. In the United States there are fewer...

Each NPA is identified by one or more numbering plan area codes (NPA codes, or area codes), consisting of three digits that are prefixed to each local...

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...

ISO 3166-1 (Codes for the representation of names of countries and their subdivisions – Part 1: Country codes) is a standard defining codes for the names...

response codes. Reed Solomon Codes for Coders – an elaborate tutorial on Wikiversity, covering both QR code structure and the Reed Solomon codes used to...

three-letter code standard. This table lists all two-letter codes (set 1), one per language for ISO 639 macrolanguage, and some of the three-letter codes of the...

Hospital emergency codes have varied widely by location, even between hospitals in the same community. Confusion over these codes has led to the proposal...

regions are also identified by a unique ICAO-code. ICAO codes are separate and different from IATA codes, the latter of which have three letters and are...

ISO 3166-1 alpha-3 codes are three-letter country codes defined in ISO 3166-1, part of the ISO 3166 standard published by the International Organization...

IC codes (identity code) or 6+1 codes are codes used by the British police in radio communications and crime recording systems to describe the apparent...

provided by a division of the telephone numbering plan into groups of area codes for the following regions: Telephone numbers in Mexico "Telephone numbering...

Postal codes used in the United Kingdom, British Overseas Territories and Crown dependencies are known as postcodes (originally, postal codes). They are...

This is a list of postal codes in Canada where the first letter is T. Postal codes beginning with T are located within the Canadian province of Alberta...

following is a list of codes for International Statistical Classification of Diseases and Related Health Problems. List of ICD-9 codes 001–139: infectious...

ISO 3166-1 alpha-2 codes are two-letter country codes defined in ISO 3166-1, part of the ISO 3166 standard published by the International Organization...

police codes include "10 codes" (such as 10-4 for "okay" or "acknowledged"—sometimes written X4 or X-4), signals, incident codes, response codes, or other...

Ten-codes, officially known as ten signals, are brevity codes used to represent common phrases in voice communication, particularly by public safety officials...

International Organization for Standardization (ISO) that defines alpha codes and numeric codes for the representation of currencies and provides information about...

original North American area codes. The state of California was divided into three numbering plan areas (NPAs) with distinct area codes: 213, 415, and 916, for...

for codes in the 01xxx–16xxx range which identify the delegaciones (boroughs) of Mexico City. List of states of Mexico Mexico state-abbreviation codes Consulta...