bar code

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bar code

Commerce a machine-readable arrangement of numbers and parallel lines of different widths printed on a package, which can be electronically scanned at a checkout to register the price of the goods and to activate computer stock-checking and reordering

bar code

[′bär ‚kōd]
(computer science)
The representation of alphanumeric characters by series of adjacent stripes of various widths, for example, the universal product code.

bar code

(convention)
A printed horizontal strip of vertical bars of varying widths, groups of which represent decimal digits and are used for identifying commercial products or parts. Bar codes are read by a bar code reader and the code interpreted either through software or a hardware decoder.

All products sold in open trade are numbered and bar-coded to a worldwide standard, which was introduced in the US in 1973 and to the rest of the world in 1977. The Uniform Code Council in the US, along with the international article numbering authority, EAN International, allocate blocks of unique 12 or 13-digit numbers to member companies through a national numbering authority. In Britain this is the Article Number Association. Most companies are allocated 100,000 numbers that they can use to identify any of their products, services or locations.

Each code typically contains a leading "quiet" zone, start character, data character, optional check digit, stop character and a trailing quiet zone. The check digit is used to verify that the number has been scanned correctly. The quiet zone could be white, red or yellow if viewed by a red scanner. Bar code readers usually use visible red light with a wavelength between 632.8 and 680 nanometres.

References in periodicals archive ?
When this happens over the next 12 to 18 mouths, UDR already will be branded as the apartment company that uses 2-D bar codes for mobile marketing," Taraborelli said.
One European manufacturer has already installed 500 "read points" - stations where 2-D bar codes are read during manufacturing - and will have deployed 1000 read points by the end of this year.
The new Kofax bar code engine not only reads low-resolution color images, but also improves recognition from black-and-white images and adds the ability to read high-density 2-D bar codes.
Developed by Symbol Technologies and placed in the public domain, PDF417 is a 2-D bar code symbology capable of encoding more than 1,800 bytes of data on a single label, offering 100 times the capacity of traditional linear bar codes.
Because of the ability to encode large amounts of data, 2-D bar codes can become portable data files - hence "PDF.
Its combination with CiMatrix' pioneering position in leading edge 2-D bar code technology now uniquely positions RVSI to open new market applications of very significant size.
Supported linear and 2-D bar codes include: Code 39, Datamatrix, PDF417, UCC/EAN Code 128 and UPC/EAN.
The press prints 1-D and 2-D bar codes that are accurate and readable, which is absolutely a must for today's supply chain labeling," continued Lowry.