What is bar code ?
		Bar code is a pattern of bars and spaces which represent numbers, letters or characters.
		Code 39, for instance, has a unique pattern. Code 3 of 9, as it is sometimes called, derives its name from the way in which the pattern is created. Each character has nine elements (five bars and four spaces) and three of them are fat.
Why Use Bar Code?
		Bar codes are accurate. They eliminate manual data entry errors. Research has shown that the error rate due to bar code misreads is less than one thousandth of one percent. Tests have shown that bar coded information had a throughput accuracy rate of 1 error in 10,000,000 characters. Compare that to keyboard entry error rates of 1 error in 100 characters.
		Bar codes speed data entry. Even with a simple wand, a bar code can be scanned in a fraction of the time it takes to enter the information manually. CCD and laser scanners are also available for even faster data entry.
		Bar codes can be produced easily and cheaply. Bar codes can be printed on most computer printers, for the cost of ink and paper. Even a low cost dot matrix printer can produce bar codes of adequate quality.

* The above information was copied from www.barcodehq.com

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