Encodings

standard which delineates currency designators and its countries

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 Wave for labelling automobile parts. It features white and black squares within a square grid featuring fiducial markers on the corners, readable by imaging devices like cameras, and processed using Reed–Solomon error correction until the image can be appropriately interpreted. The required data is then extracted from patterns that are present in both the horizontal and the vertical components of the QR image.

thumb|A Universal Product Code|UPC-A barcode A barcode or bar code is a method of representing data in a visual, machine-readable symbolic form. Initially, barcodes represented data by varying the widths, spacings and sizes of parallel lines. These barcodes, commonly referred to as linear or one-dimensional (1D), can be scanned by optical scanners known as barcode readers.

In communications and information processing, code is a system of rules to convert information—such as a letter, word, sound, image, or gesture—into another form, sometimes shortened or secret, for communication through a communication channel or storage in a storage medium. An early example is an invention of language, which enabled a person, through speech, to communicate what they thought, saw, heard, or felt to others. But speech limits the range of communication to the distance a voice can carry and limits the audience to those present when the speech is uttered. The invention of writing,

transliteration scheme

SOS is a Morse code distress signal (), used internationally, originally established for maritime use. In formal notation SOS is written with an overscore line (), to indicate that the Morse code equivalents for the individual letters of "SOS" are transmitted as an unbroken sequence of three dots / three dashes / three dots, with no spaces between the letters. In International Morse Code three dots form the letter "S" and three dashes make the letter "O", so "S O S" became a common way to remember the order of the dots and dashes. IWB, VZE, 3B, and V7 form equivalent sequences, but t

UTF-8 is a character encoding standard used for electronic communication. Defined by the Unicode Standard, the name is derived from Unicode Transformation Format 8-bit. As of 2026, almost every webpage (99%) is transmitted as UTF-8.

ASCII line notation for the structure of chemical species

thumb|An "eleet hacker" (31337 H4XØR) laptop sticker, along with a "Free Kevin Mitnick|Kevin" sticker

nomenclature of organic compounds

identifier for chemical substances

information represented using the binary number system

short story by Arthur Conan Doyle

abbreviation used to uniquely identify publicly traded shares or cryptocurrencies

radiotelegraphy message code

UTF-16 (16-bit Unicode Transformation Format) is a character encoding that supports all 1,112,064 valid code points of Unicode. The encoding is variable-length as code points are encoded with one or two code units. UTF-16 arose from an earlier obsolete fixed-width 16-bit encoding now known as UCS-2 (for 2-byte Universal Character Set), once it became clear that more than 216 (65,536) code points were needed, including most emoji and important CJK characters such as for personal and place names.

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) and 3D printing programming language. It is used mainly in computer-aided manufacturing to control automated machine tools, as well as for 3D-printer slicer applications. G-code has many variants.

internationally recognized means for obtaining help

document provided by an airline during check-in, giving a passenger permission to board the airplane

bit-oriented code-transparent synchronous data link layer protocol

power spectrum of a noise signal (a signal produced by a stochastic process)

thumb|The "Welcome to Fabulous Las Vegas" sign, just to the south of the [[Las Vegas Strip]] thumb|Driver location signs|Driver location sign used in [[England to assist drivers when contacting emergency services]]

airborne radio transponder used to transmit specific aircraft information in response to interrogation

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system of uniquely identifying features on the surface of a planet or natural satellite

set of symbols appearing on plastic products that identify the plastic resin out of which the product is made

use of color-coded handkerchiefs or bandanas in the gay and BDSM communities

brevity code for Ham radio signal reports

type of line code where two nonzero values are used

abbreviation assigned by IATA to facilitate air travel

system for displaying information by using different colours

digital telecommunications technique

encoding in communication technology

encoding for text messages

types of codes used to identify air navigation and weather stations

methods of automatically identifying objects by computer system

line code mapping 8-bit words to 10-bit symbols

Ten-codes, officially known as ten signals, are brevity codes used to represent common phrases in voice communication, particularly by US public safety officials and in citizens band (CB) radio transmissions. The police version of ten-codes is officially known as the APCO Project 14 Aural Brevity Code.

international standard covering the coding, identification and marking of shipping containers

framed|The binary signal is encoded using rectangular pulse-amplitude modulation with polar return-to-zero code

A timecode (alternatively, time code) is a sequence of numeric codes generated at regular intervals by a timing synchronization system. Timecode is used in video production, show control and other applications that require temporal coordination or logging of recording or actions.

relative direction using a dial

A scancode (or scan code) is the data that most computer keyboards send to a computer to report which keys have been pressed. A number, or sequence of numbers, is assigned to each key on the keyboard.

unclassified designator for United States military electronic equipment

alphanumeric code on the sidewall of tires, specifying information such as dimensions and limitations

system to taxonomize human facial movements by their appearance on the face

Standard used to indicate the strength of a runway, taxiway or airport apron (or ramp).

four-digit decimal character encoding for electrically telegraphing messages written with Chinese characters

Morse code operating signal of the US Army

2D matrix symbology

QFF is an Aeronautical Code Q code. It is the MSL pressure derived from local meteorological station conditions in accordance with meteorological practice. This is the altimeter setting that is intended to produce correct altitude indication (i.e., no error) on an altimeter at the actual sea level elevation, while QNH is intended to have no error at the station elevation (or, especially when applied within a region with a relatively small range of surface elevations, at the altitudes close to the surface elevation within the region).

labeling system for optical filters

number assigned by the National Statistics Institute to each Belgian town

worldwide system of aeronautical fixed circuits

identifier of a particular part design in engineering

powerful air horn that serves as an audible warning device on electric and diesel locomotives

non-return-to-zero (NRZ) line code

code used in the classification system "International Standardized Mountain Subdivision of the Alps (SOIUSA)", to denote which part, sector, section, subsection, supergroup, group and subgroup of the Alps a summit belongs to

system of codes for unambiguously representing measurement units