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特許 権利維持 To display all alphabetic character strings within one display unit. The alphabetic character string display device defines a coordinate system which has five coordinate axes a-e each extended based on an origin such that each angle between the adjacent axes becomes about 72°. In the coordinate system, five coordinate points defined by the scales of the coordinate displayed by natural numbers 1-5 or n multiple of 1-5 are allocated onto each coordinate axis, and 26 alphabetic characters are previously allocated to the origin and the 25 coordinate points in total.The coordinate system sequentially displays the beginning to the end of the alphabetic character strings to be output through the origin or the coordinate points corresponding to them, or converts them to electronic data for output.