Patent ID: 7269618

Claim:
A server system comprising: a data storage section in which data is stored; a requested information transmission control section for responding to an initial information transmission request sent from a given information transmission request source via the Internet, extracting requested information from said data storage section, and sending the information to the given information transmission request source; an information management section for sending an event associated with updating of the requested information, said event causing real-time updating of a content of a web page being browsed by a browser of the given information transmission request source without an update request from the given information transmission request source; a plurality of difference update instruction issuing sections corresponding to a plurality of client terminals, said plurality of client terminals including said given information transmission request source, each of said plurality of client terminals receiving individualized requested information from said data storage section via said requested information transmission control section, one difference update instruction issuing section of said plurality of difference update instruction issuing sections receiving the event from said information management section and issuing a plurality of difference update instructions to update the requested information; an initial state storage section for storing an initial state associated with the requested information sent to the given information transmission request source; an event management section for selecting said one difference update instruction issuing section of said plurality of difference update instruction issuing sections on the basis of the initial state stored in the initial state storage section, and notifying said selected one difference update instruction issuing section of the event from said information management section; and a plurality of transmission control sections each for transmitting a corresponding plurality of difference update instructions to a corresponding client terminal of the plurality of client terminals individually for one or more corresponding events associated with updating of corresponding requested information that has been sent to the corresponding client terminal; wherein a transmission control section of the plurality of transmission control sections allows for sending, to the given information transmission request source, said plurality of difference update instructions issued by said selected one difference update instruction issuing section which is notified of the event.