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由于要花费太长的时间和太高的费用,基本数据已经不能转换成可由计算机立即进行处理的形式。当前,正在加紧发展采用各种新型微电子产品的数据输入传输技术。超级市场中的销售点(POS)装置就是其中最重要的进展之一。这种装置有一个激光扫描
Due to the time and expense involved, basic data can no longer be converted into a form that can be processed immediately by the computer. Currently, stepping up the development of data input transmission technology using a variety of new microelectronic products. Point-of-sale (POS) devices in supermarkets are one of the most significant developments. This device has a laser scan