Disclosed are a communication apparatus capable of registering telephone directory data at once from e-mail containing the telephone directory data into a telephone directory of a communication apparatus. A communication apparatus according to this invention is a communication apparatus having a function of transmitting/receiving e-mail, and characterized by including a communication partner information storage unit for storing communication partner information having predetermined registration items, an identifier detecting unit for detecting a predetermined identifier from received e-mail, and a registering unit for registering information described in the e-mail in accordance with the detected identifier into that registration item of the communication partner information which corresponds to the identifier.

 
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< Communication method and apparatus, server and client on network, and program codes realizing communication thereof

> Signal processor with a plurality of kinds of processors and a shared memory accessed through a versatile control means

> Position/orientation measurement method, and position/orientation measurement apparatus

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