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 ?
Since 2011, the Internet companies (Tencent, Alibaba) have promoted the 2-dimensional bar code business.
This is useful for anyone planning to use 2D bar codes as well as for the label converter who wants to be able to provide clients with feedback on their 2D bar code projects.
As the technology develops, the data storage and cost issues will, like early bar code technology, improve in performance and price from the user's standpoint.
Jim Brouillard, manager of operations program support for the Van Nuys postal district, said letters were sent to residents' homes where the bar codes were put in.
On the other hand, the gene isn't a suitable bar code for plants or bacteria.
Bar codes are a more efficient means of entering repetitive data into a computer than keyboards.
San Diego-based IntelliDOT develops and installs point of care bar code patient safety and documentation systems in hospitals.
headquartered in Pleasanton, designs and distributes document management and bar code software products for the business community.
Starting this fall, Mohr will do a study for the Departments of Energy and Defense to determine the best ways to attach labels and how tell the new bar codes stand up to the harsh environments associated with hazardous materials.
EAN application identifiers, rotate bar codes, produce two-dimensional (2-D) symbologies and use XML-style bar code triggers up to 30 characters.
In addition to increased speed and smaller size, the new MEMS-based scanning technology from Intermec allows laser scanners to read more sophisticated types of bar codes, such as stacked bar codes and linear codes.