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Bar Codes

Bar coding is a common form of automatic identification. It is a system of wide and narrow lines and spaces which are used to represent alphabetical and numerical characters. A laser is used to “read” the patterns of light and dark. It converts this data into digital information that is usable by a computer. One type of coding is Code 39. This system includes “quiet areas” at the beginning and ending of a code as well as start and stop characters. These help ensure that the reader functions properly and that the complete codes are read accurately.


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Tony Ferguson,
Feb 6, 2012, 10:28 AM
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Tony Ferguson,
Feb 6, 2012, 10:26 AM
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