USB ,是英文Universal Serial BUS（通用串行总线）的缩写，而其中文简称为“通串线，是一个外部总线标准，用于规范电脑与外部设备的连接和通讯。是应用在PC领域的接口技术。USB接口支持设备的即插即用和热插拔功能。USB是在1994年底由英特尔、康柏、IBM、Microsoft等多家公司联合提出的。-USB, is English Universal Serial BUS (USB) abbreviation, while the Chinese referred to as the " pass line is, is an external bus standard to standardize the connection of computer and peripheral equipment and communications. Is the application interface in the PC field technology. USB interface, Plug and Play and hot swap support equipment functions. USB is the end of 1994, by Intel, Compaq, IBM, Microsoft and other companies jointly proposed.