Abstract: A chat system comprises editor 1 which includes an input area for chatting and an output area where chat conversation is written; information converter 2 which is capable of reading an inputted character string written into the editor 1 and detecting a specific input, and outputting an input to an input area in the editor 1, and reads a character string existing in the editor 1, converts the character string to a code and add to control information for a chat; transmitter 3 which transmits information outputted from the information converter 2 to a chat communication partner; receiver 4 which receives information sent from the chat partner; and information analyzer/converter 5 which analyzes and converts a code to a character string, outputs the character string onto the output area in the editor 1, and performs an operation in accordance with the control information.

Abstract: Voice clauses are divided and transmitted as packet data in divided clause units in a transmission side. The voice data is outputted as voice based on the received packet data in clause units in a receipt side. Thus, the meaning of speech is even able to be recognized in a deteriorated communication path environment.

Abstract: A chat system comprises editor 1 which includes an input area for chatting and an output area where chat conversation is written; information converter 2 which is capable of reading an inputted character string written into the editor 1 and detecting a specific input, and outputting an input to an input area in the editor 1, and reads a character string existing in the editor 1, converts the character string to a code and add to control information for a chat; transmitter 3 which transmits information outputted from the information converter 2 to a chat communication partner; receiver 4 which receives information sent from the chat partner; and information analyzer/converter 5 which analyzes and converts a code to a character string, outputs the character string onto the output area in the editor 1, and performs an operation in accordance with the control information.

Abstract: CPU (Information Processing Unit) of PDA extracts prescribed hardware information such as mounting/demounting of a cradle from hardware information, and carries out telephone operation control such as on-hook, off-hook, etc. on the basis of the hardware information thus extracted. CPU of PDA extracts prescribed hardware information (turn-on state of back light of a display portion) from hardware information, and a hardware controller 2 carries out turn-on control of back light or the like of the display portion on the basis of the extracted hardware information and telephone control information such as information indicating whether a telephone call state of PDA is possible or not.

Abstract: Voice clauses are divided and transmitted as packet data in divided clause units in a transmission side. The voice data is outputted as voice based on the received packet data in clause units in a receipt side. Thus, the meaning of speech even is recognized in a deteriorated communication path environment.