Category:catering food

Question:
a variety of goods have bar codes, there is any effect

Answer:
alias barcode bar code, bar code from the United States, NT.Woodland first proposed in 1949. With the growing popularity of computer applications, the application of bar code has been great development. Bar codes can be marked goods producers, manufacturers, trade names, date of production, book words, e-mail starting and ending location, category, date and other information, so in the circulation of commodities, library management, telecommunications management, banking system, and many other fields have been a wide range of applications. Bar code is different from the width of the reflectivity of different articles and empty, according to a certain coding rules (code system) compiled, and for the expression of a set of numbers or letters graphic identifier symbol information. That the bar code is a set of different thickness, according to certain rules of parallel lines spaced arrangement graph. The common bar code is a big difference in reflectivity black bar (abbreviated) and white bars (the empty) constituted.
the composition of the bar code identification system in order to read out the bar code represented by the information, you need a bar code identification system, which consists of bar code scanners, larger shaping circuit, decoder interface circuit and computer system components.

used in printers and bar code printer bar code printing method using a traditional method is a special bar code printer is able to quickly print a large number of self-adhesive label, PET label, tag, washing cloth such as printing devices. Generally have thermal model type and thermal transfer printing method, using a dedicated label paper and ribbon. In the printed labels require a lot of places, especially at short notice a large number of printing plants and the need for special tags (eg, PVC material, waterproof material), namely, the need instant hit (such as the box office, etc.) where should choose the bar code printer. If you regularly print a large number of labels, or tags have special requirements, please choose to use the bar code printer. Bar code printers have been widely used to produce all aspects of life, such as: supermarkets, government departments, manufacturing companies, logistics and so on.

bar code Category: one-dimensional, two-dimensional bar codes

due to a one-dimensional bar code information capacity is very small, and therefore the application of bar code has been somewhat restricted. Two-dimensional bar code followed by the emergence of two-dimensional bar codes and have a common advantage of bar code, the two-dimensional bar codes also have information on large capacity, high reliability, confidentiality, security and strong, easy-to-production, and low cost. Symbol Company in the United States in 1991, officially launch the two-dimensional PDF417 bar codes, known as the PDF417 bar code, that is, “portable data file.” FDF417 two-dimensional bar code is a high-density, high information content of the portable data files, documents and cards for achieving such large-capacity, high reliability, information is automatically stored, transported and can be an ideal means to read the machine automatically.

Answer:
bar code, there are details of the goods, in order to identify the computer.

Chinese:各种商品上都有条形码,是有什么作用

类别: 餐饮食品

问题:
各种商品上都有条形码,是有什么作用

回答:
条形码别名条码，条形码是由美国的NT.Woodland在1949年首先提出的。随着计算机应用的不断普及，条形码的应用得到了很大的发展。条形码可以标出商品的生产国、制造厂家、商品名称、生产日期、图书分类号、邮件起止地点、类别、日期等信息，因而在商品流通、图书管理、邮电管理、银行系统等许多领域都得到了广泛的应用。条形码是由宽度不同、反射率不同的条和空，按照一定的编码规则（码制）编制成的，用以表达一组数字或字母符号信息的图形标识符。即条形码是一组粗细不同，按照一定的规则安排间距的平行线条图形。常见的条形码是由反射率相差很大的黑条（简称条）和白条（简称空）组成的。
条形码识别系统的组成 为了阅读出条形码所代表的信息，需要一套条形码识别系统，它由条形码扫描器、放大整形电路、译码接口电路和计算机系统等部分组成。

条形码应用在打印机方面 条形码打印机打印方式采用一种传统的打印方式，条形码打印机是是一种专门能够大量快速打印不干胶标签、PET标签、吊牌、水洗布等的打印设备。一般有热敏型和热转印型打印方式，使用专用的标签纸和碳带。 在需大量打印标签的地方，特别是工厂需在短时间内大量打印以及需要特殊标签（如PVC材料、防水材料）、需要即用即打（如售票处等）的地方，应选择条形码打印机。 如果您经常大量打印标签，或对标签有特殊要求，请您选择使用条形码打印机。 条形码打印机已经广泛应用于生产生活中的各个方面，例如：超市、政府部门、生产制造企业、物流等等。

条形码分类：一维、二维条形码

由于一维条形码的信息容量很小，因而条码的应用范围受到了一定的限制。 二维条形码随后出现，二维条形码除具有普通条码的优点外，二维条形码还具有信息容量大、可靠性高、保密防伪性强、易于制作、成本低等优点。美国Symbol公司于1991年正式推出名为PDF417的二维条形码，简称为PDF417条码，即“便携式数据文件”。FDF417二维条形码是一种高密度、高信息含量的便携式数据文件，是实现证件及卡片等大容量、高可靠性信息自动存储、携带并可用机器自动识读的理想手段。

回答:
条形码里有该商品的详细信息，为了电脑识别。