A system for posting and downloading messages and files from a bulletin board system is described. The system allows a user to retrieve a message from a bulletin board system and then selectively download files which are represented within the message as objects, which may be visually presented to a...http://www.google.com.tw/patents/US5923846?utm_source=gb-gplus-share專利 US5923846 - Method of uploading a message containing a file reference to a server and downloading a file from the server using the file reference