中人氏大學 数据与知识工程研究所 RENMIN UNIVERSITY OF CHINA Institute of Data and Know ledge Eng ineer ing Background Knowledge Development history PIM is not new PIM broadly defined includes the management of information going into our own memories as well the management of external information. as such an interest in Plm-related matters is evidenced in the study of mnemonic techniques going back to ancient times 9 cabinet PIM WDMWDM PIM broadly defined includes the management of information going into our own memories as well the management of external information. As such, an interest in PIM-related matters is evidenced in the study of mnemonic techniques going back to ancient times. Development History : PIM is not new Background Knowledge