| 摘要 |
Terminals 2-1 to 2-3 and a host computer 1 have client programs A to D of a basic function for outputting characters representing text data entered thereto to their own display units and transmitting the characters to other apparatuses for displaying them therein. When a new function is added, a client program E providing the new function is newly incorporated in the host computer 1. When text data is entered to, for example, the terminal 2-1, the client program E determines whether or not the entered text data includes specific text data which is defined in advance. If the specific text data is included, processing associated with the specific data is executed and results obtained from the execution are passed to the client program D to be transmitted to the terminals 2-1 to 2-3. In this way, a new function can be added with ease without modifying the basic function.
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