The libraries growing into a member of the worldwide network needs a system of the graphic symbols and characters that can be distingnished and processed by each library,just as the human society advancing to a new pattern of the multiple and integrated world needs an information system of graphic symbols and characters commonly understood.The system must meet the needs of the multilingual information processing for the libraries.It is ISO/ IEC 10646 Information technology-Universal Multiple-Octet Coded Character Set..