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System of rules to convert information into another form or representation
In communications and information processing, a code is a system of rules to convert information—such as a letter, word, sound, image, or gesture—into
Code
Topics referred to by the same term
CODE may refer to: Call of Duty Endowment, a non-profit foundation CODE University of Applied Sciences, a university in Berlin Confederation of Democracy
CODE
Type of two-dimensional barcode
A QR code, short for quick-response code, is a type of two-dimensional matrix barcode invented in 1994 by Masahiro Hara of the Japanese company Denso
QR_code
Transmission of language with brief pulses
Morse code is a telecommunications method which encodes text characters as standardized sequences of two different signal durations, called dots and dashes
Morse_code
Numeric postal code used in the US and its territories
The ZIP Code system (an acronym for Zone Improvement Plan) is the system of postal codes used by the United States Postal Service (USPS). The term ZIP
ZIP_Code
1996 studio album by Pearl Jam
No Code is the fourth studio album by American rock band Pearl Jam, released on August 27, 1996, through Epic Records. Following a troubled tour for its
No_Code
AI-dependent computer programming
language model (LLM), which generates source code automatically. Vibe coding may involve accepting AI-generated code without thorough review of the output,
Vibe_coding
Series of letters and digits for sorting mail
A postal code (also known locally in various English-speaking countries throughout the world as a postcode, post code, PIN or ZIP Code) is a series of
Postal_code
Topics referred to by the same term
programs Line coding, in data storage Source coding, compression used in data transmission Coding theory Channel coding Encryption coding, a process of
Coding
Standard defining codes for currencies
International Organization for Standardization (ISO) that defines alpha codes and numeric codes for the representation of currencies, and provides information
ISO_4217
Japanese anime television series
Code Geass: Lelouch of the Rebellion (Japanese: コードギアス 反逆のルルーシュ, Hepburn: Kōdo Giasu: Hangyaku no Rurūshu), often referred to as simply Code Geass, is
Code_Geass
Topics referred to by the same term
No code may refer to: No Code, a 1996 album by Pearl Jam No Code (company), a British video game company No-code development platform, software development
No_code
Phrases used over a public address system
Hospital emergency codes are coded messages often announced over a public address system of a hospital to alert staff to various classes of on-site emergencies
Hospital_emergency_codes
Ordering of binary values, used for positioning and error correction
The reflected binary code (RBC), also known as reflected binary (RB) or Gray code after Frank Gray, is an ordering of the binary numeral system such that
Gray_code
country codes are telephone number prefixes for reaching subscribers in foreign countries or areas by international direct dialing (IDD). Country codes are
List of telephone country codes
List_of_telephone_country_codes
French civil code established in 1804
Napoleonic Code (French: Code Napoléon), officially the Civil Code of the French (French: Code civil des Français; simply referred to as Code civil), is
Napoleonic_Code
Topics referred to by the same term
Look up Code, code, or codé in Wiktionary, the free dictionary. A code is a rule for converting a piece of information into another object or action, not
Code_(disambiguation)
Standard codes for geographical names
by the International Organization for Standardization (ISO) that defines codes for the names of countries, dependent territories, special areas of geographical
ISO_3166
Two-letter country codes defined in ISO 3166-1
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
ISO_3166-1_alpha-2
Dated classifications of computing character sets
In computing, a code page is a character encoding and as such it is a specific association of a set of (identifiers for) printable and non-printable characters
Code_page
Rules by which information encoded within genetic material is translated into proteins
Genetic code is a set of rules used by living cells to translate information encoded within genetic material (DNA or RNA sequences of nucleotide triplets
Genetic_code
Changing between languages during a conversation
In linguistics, code-switching or language alternation is the process of shifting from one linguistic code (a language or dialect) to another, depending
Code-switching
lists standard and notable non-standard HTTP response status codes. Standardized codes are defined by IETF as documented in Request for Comments (RFC)
List_of_HTTP_status_codes
Family of linear error-correcting codes
computer science and telecommunications, Hamming codes are a family of linear error-correcting codes. Hamming codes can detect one-bit and two-bit errors, or
Hamming_code
Babylonian legal text
The Code of Hammurabi is a Babylonian legal text composed c. 1753 BC. It is the longest, best-organized, and best-preserved legal text from the ancient
Code_of_Hammurabi
Technique to compress data
Huffman code is a particular type of optimal prefix code that is commonly used for lossless data compression. The process of finding or using such a code is
Huffman_coding
Instructions a computer can execute
components. A computer program in its human-readable form is called source code. Source code needs another computer program to execute because computers can only
Computer_program
Numbering method for assigning routing addresses for telephones
participants in a telephone network, reachable by a system of destination code routing. Telephone numbering plans are defined world-wide, as well as within
Telephone_numbering_plan
U.S. film studio self-censorship rules (1930–1967)
The Motion Picture Production Code was a set of industry guidelines for the self-censorship of content that was applied to most motion pictures released
Hays_Code
Internet error message
In HTTP, the 404 HTTP status code indicates that a web client (i.e. browser) was able to communicate with a server, but the server could not provide the
HTTP_404
General-purpose programming language
Python is a high-level, general-purpose programming language that emphasizes code readability, simplicity, and ease-of-writing with the use of significant
Python_(programming_language)
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
List of North American Numbering Plan area codes
List_of_North_American_Numbering_Plan_area_codes
US pacifist, anti-war organization
Code Pink: Women for Peace (often stylized as CODEPINK) is a pacifist, anti-war organization registered in the United States as a 501(c)(3) organization
Code_Pink
Encoded data represented in binary notation
A binary code is the value of a data-encoding convention represented in a binary notation that usually is a sequence of 0s and 1s, sometimes called a bit
Binary_code
Computer security exploit using injected code
Code injection is a computer security exploit where a program fails to correctly process external data, such as user input, causing it to interpret the
Code_injection
Character encoding standard
ASCII (/ˈæski/ ASS-kee), an acronym for American Standard Code for Information Interchange, is a character encoding standard for representing a particular
ASCII
Human-readable instructions for a computer
In computing, source code, or simply code or source, is human readable plain text that can eventually result in controlling the behavior of a computer[citation
Source_code
Translator of computer source code
that takes the source code of a program written in a programming language as its input and produces an equivalent source code in the same or a different
Source-to-source_compiler
Three-letter air-travel designation for airports and cities
An IATA airport code, also known as an IATA location identifier, IATA station code, or simply a location identifier, is a unique three-letter geocode designating
IATA_airport_code
2011 film by Duncan Jones
Source Code is a 2011 science fiction action thriller film directed by Duncan Jones and written by Ben Ripley. It stars Jake Gyllenhaal as a US Army officer
Source_Code
Military personnel using their native languages for secret wartime communication
A code talker was a person employed by the military during wartime to use a little-known language as a means of secret communication. The term is most
Code_talker
2000 video game
Resident Evil – Code: Veronica is a 2000 survival horror video game developed and published by Capcom for the Dreamcast. It was the first Resident Evil
Resident Evil – Code: Veronica
Resident_Evil_–_Code:_Veronica
Set of rules by the Committee of Advertising Practice
The UK Code of Non-broadcast Advertising, Sales Promotion and Direct Marketing (CAP Code) is the rule book for non-broadcast advertisements, sales promotions
CAP_Code
Characteristic of DVDs
DVD region codes are a digital rights management technique introduced in 1997. It is designed to allow rights holders to control the international distribution
DVD_region_code
Four-letter code designation for aviation facilities around the world
The ICAO airport code or ICAO location indicator is a four-letter code designating aerodromes around the world. These codes are defined by the International
ICAO_airport_code
Set of codewords, none a prefix of another
necessarily a prefix code. Prefix codes are also known as prefix-free codes, prefix condition codes and instantaneous codes. Although Huffman coding is just one
Prefix_code
Use of color-coded bandannas in the gay and BDSM communities
The handkerchief code (also known as the hanky code, the bandana code, and flagging) is a system of color-coded cloth handkerchiefs or bandanas for non-verbally
Handkerchief_code
Scottish video game developer
Screen Burn Interactive Limited (formerly No Code Limited) is a British video game developer based in Glasgow, Scotland. The company was founded on August
Screen_Burn_(company)
Cheat code, originally for Konami games
Konami Code (Japanese: コナミコマンド, Konami Komando, "Konami command"), also commonly referred to as the Contra Code and sometimes the 30 Lives Code, is a cheat
Konami_Code
Notation to specify resistor and capacitor values
The RKM code is a notation for the specification of resistors and capacitors, defined since 1952 by the International Electrotechnical Commission (IEC)
RKM_code
Causing rape of trans prisoners for social control
In the context of incarceration in the United States, V-coding is the common practice by carceral staff of subjecting trans women to sexual assault by
V-coding
Barcode format
Code 128 is a high-density linear barcode symbology defined in ISO/IEC 15417:2007. It is used for alphanumeric or numeric-only barcodes. It can encode
Code_128
Two or three letter codes that represent each country
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
List of ISO 3166 country codes
List_of_ISO_3166_country_codes
Type of block code
In coding theory, a cyclic code is a block code, where the circular shifts of each codeword gives another word that belongs to the code. They are error-correcting
Cyclic_code
Restructuring existing computer code without changing its external behavior
computer programming and software design, code refactoring is the process of restructuring existing source code—changing the factoring—without changing
Code_refactoring
ISO standard for country codes
ISO 3166-1 (Codes for the representation of names of countries and their subdivisions – Part 1: Country code) is a standard defining codes for the names
ISO_3166-1
Telephone area codes for Toronto, Ontario
Area codes 416, 647, 437, and 942 are telephone overlay area codes in the North American Numbering Plan (NANP) for the city of Toronto, Ontario, Canada
Area codes 416, 647, 437, and 942
Area_codes_416,_647,_437,_and_942
Three-letter country codes defined in ISO 3166-1
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
ISO_3166-1_alpha-3
Standardized identifier of financial markets
The Market Identifier Code (MIC) (ISO 10383) is a unique identification code used to identify securities trading exchanges, regulated and non-regulated
Market_Identifier_Code
Pioneering five-bit character encodings
The Baudot code (French pronunciation: [bodo]) is an early character encoding for telegraphy invented by Émile Baudot in the 1870s. It was the predecessor
Baudot_code
Identification code for countries
A country code is a short alphanumeric identification code for countries and dependent areas. Its primary use is in data processing and communications
Country_code
Machine instruction that indicates to a computer to do nothing
((void)0). Similar techniques can be used by user code; for instance, consider the following code that defines a macro over the prefetch builtin function
NOP_(code)
Brevity codes used by a variety of US professionals
Ten-codes, officially known as ten signals, are brevity codes used to represent common phrases in voice communication, particularly by US public safety
Ten-code
Police codes for ethnicity used in the UK
IC codes (identity code) or 6+1 codes are police codes used in the United Kingdom to visually describe the apparent ethnicity of a person. They originated
IC_code
Clandestine term
A code name, codename, call sign, or cryptonym is a code word or name used, sometimes clandestinely, to refer to another name, word, project, or person
Code_name
Line code used in early magnetic data storage and Ethernet
telecommunications and data storage, Manchester code (also known as phase encoding, or bi-phase code) is a line code in which the encoding of each data bit is
Manchester_code
Using numbers to represent text characters
that make up a character encoding are known as code points and collectively comprise a code space or a code page. Early character encodings that originated
Character_encoding
Code identifying material, for recycling
Recycling codes are used to identify the materials out of which the item is made, to facilitate easier recycling process. The presence on an item of a
Recycling_codes
Deliberately delayed resuscitation attempt
Slow code refers to the practice in a hospital or other medical centre to purposely respond slowly or incompletely to a patient in cardiac arrest, particularly
Slow_code
Alphanumeric code specifying tire sizes and limits
tires are described by several alphanumeric tire codes (North American English spelling) or tyre codes (Commonwealth English spelling), which are generally
Tire_code
Integrated development environment from Microsoft
Visual Studio Code (commonly referred to as VS Code) is an integrated development environment developed by Microsoft for Windows, Linux, macOS and web
Visual_Studio_Code
Clothing code based on event or occasion
A dress code is a set of rules, often written, with regard to what clothing groups of people must wear. Dress codes are created out of social perceptions
Dress_code
American film era (1920s–1930s)
the Motion Picture Production Code censorship guidelines (popularly known as the Hays Code) in 1934. Although the Hays Code was adopted in 1930, oversight
Pre-Code_Hollywood
the "area code" was historically referred to as a "subscriber trunk dialling code" (STD code) or a "dialling code". United Kingdom area codes are two,
Telephone numbers in the United Kingdom
Telephone_numbers_in_the_United_Kingdom
American non-profit organization
Code.org, officially known as CodeAI since June 2026, is a non-profit organization and educational website founded by Hadi and Ali Partovi, aimed at K–12
Code.org
Standard for protection against intrusion of dust and water
The IP code or Ingress Protection code indicates how well a device is protected against water and dust. It is defined by the International Electrotechnical
IP_code
American Standard Code for Information Interchange (ASCII) A character encoding standard for electronic communications. ASCII codes represent text in
Glossary_of_computer_science
529 codification of Roman law by Justinian I of Byzantium
The Code of Justinian (Latin: Codex Justinianus, Justinianeus or Justiniani) is one part of the Corpus Juris Civilis, the codification of Roman law ordered
Code_of_Justinian
Implicit representation of LGBT characters
Queer coding may have had a negative impact on perceptions of queerness in media as villains in fictional stories are often queer-coded. Queer coding is
Queer_coding
Code added to allow recovery of lost data
In coding theory, an erasure code is a forward error correction (FEC) code under the assumption of bit erasures (rather than bit errors), which transforms
Erasure_code
Rules for UK government ministers
The Ministerial Code is a document setting out "rules" and standards for government ministers of the United Kingdom. Separate codes exist for ministers
Ministerial_Code
Nonprofit building standards organization
The International Code Council (ICC) is an American nonprofit standards organization sponsored by the building trades, which was founded in 1994 through
International_Code_Council
Instructions directly executable by a computer
In computing, machine code is data encoded and structured to control a computer's central processing unit (CPU) via its programmable interface. A computer
Machine_code
Type of matrix barcode
The Aztec Code is a matrix code invented by Andrew Longacre, Jr. and Robert Hussey in 1995. The code was published by AIM, Inc. in 1997. Although the Aztec
Aztec_Code
Class of codes in coding theory
In coding theory, fountain codes (also known as rateless erasure codes) are a class of erasure codes with the property that a potentially limitless sequence
Fountain_code
Study of the properties of codes and their fitness
Coding theory is the study of the properties of codes and their respective fitness for specific applications. Codes are used for data compression, cryptography
Coding_theory
Low-level programming language family
assembly language (alternatively assembler language or symbolic machine code), often referred to simply as assembly and commonly abbreviated as ASM or
Assembly_language
Index of articles associated with the same name
Airport code may refer to: International Air Transport Association airport code, a three-letter code which is used in passenger reservation, ticketing
Airport_code
Rulebooks of taxonomic nomenclature, in biology
Nomenclature codes or codes of nomenclature are the various rulebooks that govern the naming of living organisms. Standardizing the scientific names of
Nomenclature_codes
Method by which information is represented in the brain
Neural coding (or neural representation) refers to the relationship between a stimulus and its respective neuronal responses, and the signalling relationships
Neural_coding
Metric for source code testing
software engineering, code coverage, also called test coverage, is a percentage measure of the degree to which the source code of a program is executed
Code_coverage
Type of Morse code operating signal
The Q-code is a standardised collection of three-letter codes that each start with the letter "Q". It is an operating signal initially developed for commercial
Q_code
Recreational computer programming competition
Code golf is a type of recreational computer programming competition in which participants strive to achieve the shortest possible source code that solves
Code_golf
FIFA assigns a three-letter country code to each of its member and non-member countries. These are the official codes used by FIFA and its continental confederations
List_of_FIFA_country_codes
British television series (2020–)
Code 404 is a British police procedural comedy drama television series created by Tom Miller, Sam Myer, and Daniel Peak, and produced by Kudos and Water
Code_404
Postal codes in the Netherlands, known in Dutch as postcodes, were introduced in 1977 by the then PTT, now PostNL. They are alphanumeric, consisting of
Postal codes in the Netherlands
Postal_codes_in_the_Netherlands
Spoken alphabet for radio communication
read out as "proceed to map grid Delta-Hotel-Niner-Eight". Although such codes are commonly called "phonetic alphabets", they are not phonetic in the sense
NATO_phonetic_alphabet
Scheme for controlling errors in data over noisy communication channels
telecommunication, information theory, and coding theory, forward error correction (FEC) or channel coding is a technique used for controlling errors
Error_correction_code
French animated television series
Code Lyoko (French pronunciation: [kɔd ljɔko]; stylized as CODE: LYOKO in season 1 and in all caps in seasons 2–4) is a French anime-influenced animated
Code_Lyoko
Type of medical classification
codes are a sub-type of medical classification used to identify specific surgical, medical, or diagnostic interventions. The structure of the codes will
Procedure_code
travel, tourism, insurance
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travel, tourism, insurance