AIAG Automotive Industry Action Group. An automotive industry organization.

AIM Automatic Identification Manufacturers, Inc. An industry group active in promoting bar code standards. See USS.

Alignment The position of the scanner in relation to the object to be scanned.

Alphanumeric Bar Code A mixture of bar configurations representing alphabetic and numeric characters and symbols

ANSI American National Standards Institute. An industry group that develops and maintains voluntary manufacturing.

ASCII American Standard Code for Information Interchange. A 128-character code.

Aspect Ratio The ratio of bar height to symbol length.

Auto Discrimination The ability of bar code reading equipment to recognize and decode more than one symbology.

Auto Distinguish The ability of a scanner to recognize selected symbologies and process the data without operator intervention.

Background The area surrounding a printed symbol, including the spaces and quiet zones.

Bar The darker element of a printed bar code symbol. Bars may be presented horizontally or vertically.

Bar Code A series of parallel adjacent dark bars and white spaces sized and arranged to represent data.

Bar Length The bar dimension perpendicular to the bar width, also called bar height.

Bar Width The thickness of a bar measured from its front edge (closest to the start character) to its rear edge.

Bi-directional A bar code symbol that can be read from two directions.

CCD Charge-Coupled Device. A device used in scanners to register a stacked code, two-dimensional, or matrix symbol as a whole.

Character In a bar code, a single group of bars and spaces representing an individual number, letter, punctuation mark, or other symbol.

Character Alignment The vertical or horizontal position of characters relative to a reference line.

Character Set The characters that can be encoded in a particular bar code symbology, such as numbers, letters, or graphic symbols.

Charged Image A general type of printing including xerographic, laser, electrostatic, ion deposition, and magnetographic printing. These printers use an electrically charged image and ink toner to form images.

Check Character A bar code character that ensures the accuracy of the read.

Check Digit A bar code digit that serves the same purpose as a check character.

Codabar A bar code symbology whose symbols consist of characters made up of four bars with three spaces.

Code 39 A bar code symbology whose symbols consist of characters with nine elements, of which three are wide.

Code 128 A bar code symbology able to represent the 128-character ASCII character set.

Compliance Labeling Bar code label requirements issued by industries and individual companies. Label size, configuration, content, print quality, symbology, and other requirements may be specified.

Continuous Symbol A bar code symbol with no gaps between characters. All spaces within the symbol are parts of characters.

Data Identifier A bar code character (or string of characters) that defines the general category or specific use of the data that follows.

Decoder The electronic package which receives the signals from the scanner, interprets the signals into meaningful data, and transmits the data to other devices.

Density The number of characters that can be represented in a bar code symbol, usually expressed in characters per inch (cpi).

Depth of Field The distance between the maximum and minimum plan in which a code reader is capable of reading symbols.

Direct Thermal A printing method in which the print head applies heat to coated stock, which turns black to create images.

Discrete Symbol A bar code symbol with gaps between characters. These gaps are not part of the code.

Dot Matrix A system of printing where individual dots are formed into bars, letters, numbers, and simple graphics.

Dot Size 1. The size of the printed dot created by a dot matrix printer. 2. The diameter of the beam of light used to scan a bar code symbol.

Drum Printing A printing method which uses a drum containing bars, letters, and numbers to create labels.

EAN European Article Numbering System. The international standard bar code for retail food packages.

EDI Electronic Data Interchange. A method for the electronic transfer of data.

Element A single bar or space in a bar code.

Facestock The printed surface of a bar code label, usually made of paper or a synthetic material such as polypropylene, polyester, vinyl, or mylar.

Film Master A photographic film representation of a specific symbol from which a printing plate is produced.

First-Read Rate (FRR) The percentage of times a symbol is successfully scanned on the first try.

Font A specific size and style of type.

Formed Character A printing method which uses a print wheel containing bars, letters, and numbers to create labels.

HIBCC Health Industry Business Communications Council. A health industry organization.

Horizontal Symbol A bar code symbol displayed so that its bars resemble a picket fence.

Ink Jet A printing method in which ink dots are sprayed onto a surface to create images.

Intercharacter Gap The space between two adjacent bar code characters in a discrete code.

Interleaved 2-of-5 A bar code symbology whose characters consist of five bars, two of which are wide.

Laminate Protective films, such as polyester, that can be applied to label facestock.

LED Light-Emitting Diode. A semiconductor often used as a light source in scanners.

Linear Symbol A bar code symbol displayed in a single row of bars and spaces.

LOGMARS Logistics Applications of Automated Marking and reading Symbols. A U.S. Department of Defense program to place a Code 39 symbol on all federal items.

Matrix Symbols Two-dimensional bar code symbols composed of rows of characters displayed in a rectangular, square, or checkerboard pattern to include the largest amount of machine-readable information in the smallest possible area.

Misread An error that occurs when the data output of a reader does not agree with the data encoded in the symbol.

Moving-Beam Scanner A scanner using a beam that oscillates to register the label rapidly and repeatedly.

Non-Read A scan attempt which does not yield any data.

Opacity The property of a facestock or an ink to minimize or prevent what is behind the facestock or ink from showing through.

Optical Throw the distance from the scanner face to the closest point at which a symbol can be read.

Overhead The fixed number of characters required for start, stop, and checking in a given symbol.

Print Quality The measure of compliance of a bar code symbol to the requirements of dimensional tolerance, rough edges on bars, spots, voids, reflectance, quiet ones, and translation of data into code.

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