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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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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)
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
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
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
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
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
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
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
Babylonian legal text
The Code of Hammurabi is a Babylonian legal text composed c. 1753 BC. It is one of the most recognizable legal texts from the ancient Near East, written
Code_of_Hammurabi
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
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
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
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
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
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
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
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
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
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
Topics referred to by the same term
Look up code red in Wiktionary, the free dictionary. Code Red may refer to: Code Red (American TV series), a 1981–82 American television series Code Red (Indian
Code_Red
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
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
Construction standards for buildings
the main codes are the International Building Code or International Residential Code [IBC/IRC], electrical codes and plumbing, mechanical codes. Fifty states
Building_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 animated series created
Code_Lyoko
Notation used to identify a piece of music
Parsons Code of Ode to Joy * R U U R D D D D R U U R D R *-* / \ * * / \ *-* * *-* \ / \ * * *-* \ / *-* The Parsons code, formally named the Parsons code for
Parsons_code
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
UK online services regulation (2020-)
The Age appropriate design code, also known as the Children's Code, is a British internet safety and privacy code of practice created by the Information
Children's_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
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
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
Process in distributed computing
In distributed computing, code mobility is the ability for running programs, code or objects to be migrated (or moved) from one machine or application
Code_mobility
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
English, Welsh and Irish criminal law from around 1700 to 1823
The "Bloody Code" (Welsh: Y Cod Gwaedlyd) was a series of laws in England, Wales and Ireland in the eighteenth and early nineteenth centuries which imposed
Bloody_Code
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
Specifications for electrical grids
A grid code is a technical specification which defines the parameters a facility connected to a public electric grid has to meet to ensure safe, secure
Grid_code
Notation to specify resistor and capacitor values
The RKM code is a notation for the specification of resistors and capacitors, defined since 1968 by the International Electrotechnical Commission (IEC)
RKM_code
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
Human-readable instructions for a computer
In computing, source code, or simply code or source, is human readable plain text that eventually results in controlling the behavior of a computer[citation
Source_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
1685 law on slavery in the French colonial empire
The Code noir (French pronunciation: [kɔd nwaʁ], Black code) was a decree passed by King Louis XIV of France in 1685, defining the conditions of slavery
Code_noir
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
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
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
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
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
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
703 CE Japanese legal reform
The Taihō Code or Code of Taihō (大宝律令, Taihō-ritsuryō) was an administrative reorganisation enacted in 703 in Japan, at the end of the Asuka period. It
Taihō_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)
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
American electronic music group
Youth Code is an American EBM duo, formed in 2012 by Sara Taylor and Ryan George in Los Angeles, California. The duo's musical style, following the model
Youth_Code
Characteristic of source code that hints at a quality problem
computer programming, a code smell is any characteristic of source code that hints at a deeper problem. Determining what a code smell is and is not is
Code_smell
Implicit representation of LGBTQ 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
Lossless data compression scheme
simpler static code may be useful. These static codes include universal codes (such as Elias gamma coding or Fibonacci coding) and Golomb codes (such as unary
Entropy_coding
Topics referred to by the same term
write simple or repetitive code. Code Monkeys, an animated television series. "Code Monkey" (song), by Jonathan Coulton. CodeMonkey (software), an educational
Code_monkey
Portion of an object file containing executable instructions
In computing, a code segment, also known as a text segment or simply as text, is a portion of an object file or the corresponding section of the program's
Code_segment
Non-statutory restriction on word choice
A speech code is any rule or regulation that limits, restricts, or bans speech beyond the strict legal limitations upon freedom of speech or press found
Speech_code
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
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
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
Document, paper or electronic, to provide a discount on goods or services
"coupon codes", "promotional codes", "promotion codes", "discount codes", "keycodes", "promo codes", "surplus codes", "portable codes", "shopping codes", "voucher
Coupon
Topics referred to by the same term
Look up code black in Wiktionary, the free dictionary. Code Black may refer to: Code Black (emergency code), a hospital emergency code denoting a threat
Code_Black
Principles for ethical human research
The Nuremberg Code (German: Nürnberger Kodex) is a set of ethical research principles for human experimentation created by the court in U.S. v Brandt,
Nuremberg_Code
Codes used to classify languages
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
List of ISO 639 language codes
List_of_ISO_639_language_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
American non-profit organization
Code.org, branded as CodeAI since June 2026, is a non-profit organization and educational website founded by Hadi and Ali Partovi, aimed at K–12 students
Code.org
2006 mystery thriller film by Ron Howard
The Da Vinci Code is a 2006 mystery thriller film directed by Ron Howard, written by Akiva Goldsman, and based on Dan Brown's 2003 novel of the same name
The_Da_Vinci_Code_(film)
Programming language used in CNC and 3D printing
G-code (abbreviation for geometric code; also called RS-274, standardized today in ISO 6983-1) is the most widely used computer numerical control (CNC)
G-code
2026 video game
Code Violet is a 2026 action horror third-person shooter game created by TeamKill Media. Exclusive to PlayStation 5, it was officially released on January
Code_Violet
Pattern used within a communications system to represent digital data
In telecommunications, a line code is a pattern of voltage, current, or photons used to represent digital data transmitted down a communication channel
Line_code
Radio and telegraph signals encoding longer definitions
security is not Ten-code, North American police brevity codes, including such notable ones as 10-4 Phillips Code NOTAM Code Q code, currently used mainly
Brevity_code
Topics referred to by the same term
A code word or codeword may refer to: Code word (figure of speech), designed to convey a predetermined meaning to a receptive audience, while remaining
Code_word
Numerical value representing a character in a coded character set
A code point, codepoint or code position is a particular position in a table, where the position has been assigned a meaning. The table may be one dimensional
Code_point
Codification of the civil law
code is a codification of private law relating to property, family, and obligations. A jurisdiction that has a civil code generally also has a code of
Civil_code
Exodus 20:22-23:19
The Covenant Code, or Book of the Covenant, is the name given by academics to a text appearing in the Torah, at Exodus 20:22–23:19; or, more strictly,
Covenant_Code
Data center management method
Infrastructure as code (IaC) is the process of managing and provisioning computer data center resources through machine-readable definition files, rather
Infrastructure_as_code
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
travel, tourism, insurance
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travel, tourism, insurance