What are the features of bar codes

　　Bar code, refers to the width of a number of black bars and blank, in accordance with certain coding rules, to express a group of information graphic identifier. Bar codes can indicate the country of an item, the manufacturer, the name of the item, the date of production, the book classification number, the place where the mail started and ended, the type, the date and many other information. So what are the features of bar codes?

　　Bar code features:

　　Bar code is by far the most economical and practical automatic identification technology. Bar code technology has the following advantages:

　　1, reliable and accurate

　　The error rate for keyboard input data was 1 in 300, compared with 1 in 10,000 with OPTICAL character recognition and less than 1 in a million with bar codes.

　　2. Fast data input

　　Bar code entry is five times faster than keyboard entry and enables "instant data entry".

　　3. Cheap economy

　　Compared with other automatic identification technology, the cost of popularizing and applying bar code technology is lower.

　　4. Flexible and practical

　　Bar code symbol as a means of identification can be used alone, can also be composed of identification system and related equipment to achieve automatic identification, but also can be linked with other control equipment to achieve automatic management of the whole system. At the same time, manual keyboard input can also be realized when there is no automatic identification device.

　　5, freedom

　　The identification device has a much greater degree of freedom relative to the position of the bar code label than OCR (optical character Recognition). Barcodes usually represent information only in one dimension, but the information represented on the same bar code is identical and continuous, so that even if the label is partially missing, the correct information can still be entered from the normal part.

　　6. Simple equipment

　　Barcode symbol recognition equipment is simple in structure, easy to operate, without special training.

　　7. Easy to make

　　Printable, called "printable computer language". Bar code labels are easy to produce, have no special requirements for printing technology equipment and materials, and the equipment is relatively cheap.

　　Compared with other input technologies (such as keyboard input, OCR input, magnetic card input, radio frequency input), bar code technology has the advantages of fast recognition speed, low error rate, cheap equipment, low application cost and mature technology, and has been widely used in business, industry, books, medical and other fields.