Barcodes

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.

QRpedia is a mobile Web-based system which uses QR codes to deliver Wikipedia articles to users, in their preferred language. A typical use is on museum labels, linking to Wikipedia articles about the exhibited object. QR codes can easily be generated to link directly to any Uniform Resource Identifier (URI), but the QRpedia system adds further functionality. It is owned and operated by a subsidiary of Wikimedia UK (WMUK).

standard describing a barcode symbology and numbering

electronic device that can read and output printed barcodes to a computer

two-dimensional matrix barcode

barcode symbology used for tracking trade items in stores

barcode format

alt=|right|thumb|Sample of a PDF417 symbol

variable length, discrete barcode symbology

American inventor

type of 2D barcode

technology developed by Microsoft for encoding data in a 2D "barcode" using clusters of colored triangles

thumb|192x192px|Semacode used for accessing Wikipedia in the form of Semapedia. Semacode was a software company based in Waterloo, Ontario, Canada, known for a product with the same trade name – machine-readable ISO/IEC 16022 Data Matrix barcodes, which are used to encode Internet URLs.

right|thumb|200px|MaxiCode example. This encodes the string "Wikipedia, the free encyclopedia". MaxiCode is a public-domain, machine-readable symbol system developed by Donald Chandler and Eric Batterman for United Parcel Service (UPS) in 1987. Designed for tracking and managing package shipments, it resembles an Aztec Code or QR code but uses dots in a hexagonal grid instead of square grid. It is standardized under ISO/IEC 16023.

part of the GS1 systems of standards

Traceability is the capability to trace something. In some cases, it is interpreted as the ability to verify the history, location, or application of an item by means of documented recorded identification.

The Plessey Company plc was a British electronics, defence and telecommunications company. It originated in 1917, growing and diversifying into electronics. It expanded after World War II by acquisition of companies and formed overseas companies. It was listed on the London Stock Exchange and was a constituent of the FTSE 100 Index. In 1989, it was taken over by a consortium formed by GEC and Siemens which split the assets of the Plessey group.

computer peripheral to print barcode labels or tags

__NOTOC__ right|thumb|200px|A typical address containing the postcode encoded in RM4SCC

type of barcode

2D matrix symbology

Quick Response Code Indonesia Standard (abbreviated as QRIS, the abbreviation being a wordplay on keris, a traditional sword; ) is a QR code payment system developed by Bank Indonesia (BI) and the Indonesian Payment System Association (ASPI) aimed to integrate all non-cash payment methods in Indonesia. Launched in 2019, the system enables peer-to-peer (P2P) transactions between banks and person-to-merchant (P2M) payments. All payment service providers (PJP) who uses QR code payments are required to implement QRIS. QRIS can be used by all smartphones with a QR code scanner to transfer funds. QR

error-detection code for decimal digits

80px|right|Pharmacode sample Pharmacode, also known as Pharmaceutical Binary Code, is a barcode standard, used in the pharmaceutical industry as a packing control system. It is designed to be readable despite printing errors. It can be printed in multiple colors as a check to ensure that the remainder of the packaging (which the pharmaceutical company must print to protect itself from legal liability) is correctly printed. This barcode is also known as Laetuscode.

right|thumb|Library Book Barcode Codabar is a linear barcode symbology developed in 1972 by Pitney Bowes Corp. It and its variants are also known as Codeabar, Ames Code, NW-7, Monarch, Code 2 of 7, Rationalized Codabar, ANSI/AIM BC3-1995 or USD-4. Although Codabar has not been registered for United States federal trademark status, its hyphenated variant, Code-a-bar, is a registered trademark.

SQRL (pronounced "squirrel") or Secure, Quick, Reliable Login (formerly Secure Login) is a draft open standard for secure website login and authentication. The software typically uses a link of the scheme or optionally a QR code, where a user identifies via a pseudonymous zero-knowledge proof rather than providing a user ID and password. This method is thought to be impervious to a brute-force password attack or data breach. It shifts the burden of security away from the party requesting the authentication and closer to the operating-system implementation of what is possible on the hardware, a

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Barcode symbology