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.

• Bar Coding Project
• Bar Coding Table