A portable organizer device through which a student may use and maintain a personal calender. Further, a student may use the portable organizer to access assignment records maintained in a master calender used and maintained by an educational institution in a database, and synchronize the personal calendar...http://www.google.com.hk/patents/US6877987?utm_source=gb-gplus-share專利 US6877987 - Pervasive educational assistant and study aid for students
