Abstract: Disclosed is a remote operating system in which even if a remote-operated apparatus is connected to a network protected by a firewall and a remote-operating apparatus exists outside of the firewall, it is possible for the remote-operating apparatus to remotely operate the remote-operated apparatus by transmitting information containing an operation designation as a response to a command, such as a stream connection request, transmitted from the remote-operated apparatus.

Abstract: In order to carry out display control of an operating panel and realize an orderly display of an image picked up by a camera which is being controlled, an empty area in which an image picked up by one or more cameras is not displayed is searched for on a display screen, and a new picked-up image obtained from the one or more cameras is displayed in the empty area found.

Abstract: In a display of a hyper text, a hysteresis of an access to a reference file is stored into an access hysteresis file together with attribute information of the reference file. On the basis of the hysteresis of the access stored in the access hysteresis file, the presence or absence of the access to the file on the reference destination side corresponding to each link is judged. With respect to the reference file which was judged such that there was the access, on the basis of the attribute information stored in the access hysteresis file, a variation after the access of the reference file is detected. A link corresponding to the reference file is displayed in a display form according to the detected variation in a manner such that the presence or absence of the access which was judged can be discriminated. Thus, in a hyper text system, the user can recognize the variation after the access of the reference file which was accessed before.

Abstract: A cooperative activity system, in which a plurality of computer devices are connected via a network, performs an activity by cooperation among the computer devices. A server for recording data is connected to the network and monitors data transferred to the network, creates a keyword conforming to the type of data when the data is transferred and stores the keyword in a file. While data is not being generated, a keyword is created depending upon (1) whether a specific time has arrived, (2) the lapse of time spent in a certain length of a cooperative activity or (3) the passage of a prescribed period of time from an immediately preceding item of data, and both the keyword and the particular event are stored as a file. As a result, desired cooperative activity data can be read out by performing retrieval based upon the keyword.