Barcode Card
Barcode is a set of different widths, parallel adjacent section and empty, according to a certain degree of coding rules combined into symbols, can represent letters, numbers and other information, generally a bar code can hold less than 20 letters, digital information.

Bar-code technology is to study how to use bar code identification information, and identified by bar code to convert the information into a computer can recognize the language, the use of bar code technology for automatic identification.

Computer processing technology
Bar code reader is a bar code application system acquisition equipment, which can be quickly and accurately to capture the bar code card, said data information, and the data sent to computer processing. Computer is a bar code / magnetic card applications in data storage and processing equipment. As computer storage capacity, computing speed, many complicated data processing work has become convenient, rapid, and timely. Computer used to manage, you can significantly reduce the various trades workers who labor intensity, improve work efficiency, which can be performed manually in some respects, can not be done. Barcode card system, data processing technology is the key data processing technology. It can be said that whenever there is a computer database management system may be related to bar code card devices.

Barcode card key technologies:
Bar code card technology, the rapid development and widespread in many areas, and causing a lot of national attention, now in the world, engaged in bar code card technology and its family of products research and development, production and operation of up to thousands of vendors, products Up to thousands of species into a considerable scale high-tech industries.

Bar code card technology from the application point of view should cover the key points to be as follows:
1. Coding techniques
2. Loading Technology
3. Acquisition
4. Decoding Technology
5. Transmission technology
6. Treatment Technology

Barcode card equipment, technical indicators are in general made these points, different bar code card devices are generally due to their different points of the above points focus on the different surfaces produced for the application engineers to do to be on this for several the connotation of indicators have a clear understanding in order to 
facilitate selection.

At present, the international system for commonly used code are the following:
*UPC Code
*EAN code
*cross 25 yards
*Code 39
*Codabar
*Code 128
*China Post Code
*QR code
*PDF 417