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Abstract

In an application sharing system wherein terminals having application programs of the same sort are interconnected via communication channels, the application program (AP) of each of the terminals includes a primary processing part (A), a message transfer part (C), a mode registration part (F), and a share-mode transition control part (J) supplied with a share-mode transition request with channel information for setting a share mode and the channel information in the mode registration part and for making the message transfer part communicate with the application program of a sharing partner of the terminals by the use of a specified channel specified by the channel information to perform a matching operation of matching internal states of the primary processing parts of the application programs of the terminal in question and of the sharing partner. When the share mode is set in the mode registration part, the message transfer part transfers a user message from a user input processing part (B) of the primary processing part to a message processing part (C) of the primary processing part and to the sharing partner by the use of the specified channel and transfers to the message processing part another user message transferred from the application program of the sharing partner by the use of the specified channel.

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