Attribute information representing at least one attribute of each member in a system is recorded on a card. The attribute information includes fixed information settled at the time of member registration and record-information which may be changed in accordance with performance of each member. A controller...http://www.google.com.hk/patents/US7097096?utm_source=gb-gplus-share專利 US7097096 - Message system, message creating method and message creating program
