Barcode, also called "two-dimensional code", is a graphic symbol made up of black and white squares arranged according to certain rules. It can store data, such as words, websites, pictures and so on. The appearance of bar code has greatly improved the automation degree of logistics and circulation industry and made important contributions to the information process of society. At present, QR codes have become the standard on smart phones, and are widely used in life, business, medical care, education and other fields.

With the development of science and technology and the enrichment of application scenarios, bar code has become an indispensable part of modern society. For example, we can scan the express delivery number with bar code to quickly query logistics information; We can order food by scanning the code, which improves the efficiency of ordering food while avoiding crowd gathering; In electronic payment, we can also use bar code to complete the transfer quickly; Doctors can scan the patient's medical record information with bar code, make a quick and accurate diagnosis and so on. Bar codes are widely used, which greatly facilitates our life.

With the development of technologies such as 5G and big data, the application prospect of bar code has become wider and wider. The future barcode can not only store more data, but also carry out more information processing, such as face recognition, identity authentication and so on. In addition, the bar code can also be combined with intelligent hardware, such as smart home, which is convenient for management and control. In the commercial field, bar codes can also promote market efficiency and digital transformation through big data analysis. In short, the continuous progress of science and technology in the future will bring greater opportunities and challenges to the development of bar codes.