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Barcode Glossary

Description:

GLOSSARY 

Article Numbering Association - (A.N.A, the co-ordinating body in the UK for article numbering using the EAN, ITF-14 and EAN-128 standards, now renamed GS1.

AIM Automatic Identification Manufacturers Association - This organisation has branches in most countries or regions. It is supported by manufacturers and suppliers of automatic ID equipment and services. 

Alphanumeric A character set including numbers and letters - ASCII the American Standard Code for information interchange. Bar Width Reduction - the thinning of bars within a bar code which compensates for print gain. 

Bearer Bars - the protective printed lines or box around a bar code which help to support the printing plate and reduce the squashing effect on the bar code image.

Code 128 - a full alphanumeric bar code type which can encode the entire ASCII character set.

Code 39 - an alphanumeric bar code type which can encode capital letters, numbers and 7 special characters.

Codabar - a bar code type which may encode 0-9 and six special characters, four different start and stop patterns are used to signify different users.

CPI - characters per inch. 

EAN - European Article Number  The international standard for coding retail goods.

Guard Bars - the bar space patterns at the start, centre and end of EAN and UPC codes, used as a reference point for the scanning device.

GS1 - the co-ordinating body in the UK for article numbering using the EAN, ITF-14 and EAN-128 standards.

Interleaved 2 of 5 - a numeric only bar code symbology, characters are encoded in pairs with the bars representing the first character and the spaces representing the second.

ISBN International Standard Book Number - represented by the ISBN/EAN bar code on books.

ISSN International Standard Serial Number  represented on magazines and periodical publications by the ISSN/EAN bar code. 

Magnification - the method of describing bar code width and height in some symbologies, 100 % magnification is also called normal size.

Micron - one thousandth of a millimetre.

Narrow Bar - the width of a single module or narrowest bar in some symbologies. 

Nominal Size - the standard size for a bar code of a given symbology. 

Numeric Representation - using only the digits 1,2,3,4,5,6,7,8,9 and 0.

OCR-A and OCR-B - character sets or fonts both of which may be machine or human read, used for human readable information in bar coding.

Parity - a way of encoding bar/space patterns using an odd or even number of module bars or spaces, the parity may be calculated by the scanner to provide an error check.

Post Script - the high quality image description language developed by adobe systems inc. which uses vectors to describe graphical elements.

Printer Compensation - a method of adjusting bar width to compensate for a bias on a print device. 

Quiet Zone - the light space at either side of a bar code which is needed by the scanner to detect the start and end of a code. 

Raster A - a series of dots or cells arranged in a regular grid.

Reflectance - the ability of a surface or printed area to reflect light. 

Start Character - the specific bar/space pattern which indicates the start of a bar code.

Stop Character - the specific bar/space pattern which indicates the end of a bar code.

Truncation - the reduction in bar height below normal height or that normally specified. 

Transposition - the switching of the order of a pair of digits, the most common error in keyed data entry.

Uniform Code Council (U.C.C) the US organisation which administers the UPC and other retail specifications.

Universal Product Code (U.P.C) - the standard bar code type for retail products in the US. 

Verifier - a device used to measure the bars and spaces of a bar code and report on their accuracy in relation to the specified tolerances.

Wide / Narrow Ratio - the ratio between the narrow bar and the wide bar widths in certain bar code symbologies. 

X Dimension - the nominal width of a narrow bar.

Zero Suppression - the method of shortening a bar code number by eliminating 0's.

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