Expression by sign language can be inputted more easily and reliably, and search can be performed therefor as well. A general-purpose keyboard is divided into finger input areas in which shapes of fingers are allotted to respective key tops and upper body input areas in which divided portions of an upper body of a sign language talker are allotted to key tops so that information, which is meant by the sign language, can be inputted by the aid of the keyboard in cooperation of key inputs of the respective areas.
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