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U disk is one of the most frequently used office equipment for modern teachers, students and office workers. Everyone has at least one. U disk is often forgotten by the master. Even in the same school, it is difficult to find U disk owner. The design of the existing U disk based on the use of LCD display technology, can be connected to the computer when the input U disk master photo, name, department, telephone and the other information. Through open the key of the U disk, the person who picks up it can quickly find the real owner of the U disk. In addition, when some similar U disks are put together, it is convenient to recognition.