PROBLEM TO BE SOLVED: To easily and inexpensively provide a handwriting input sheet capable of inputting characters or graphics or the like by handwriting.;SOLUTION: There is easily and inexpensively provided a handwriting input sheet constituted of a medium having a writing area in which a dot pattern with coordinate information and code information repeatedly defined in at least a portion of or a plurality of areas is formed. Also, there is provided a handwriting input/output system capable of inputting characters or graphics or the like by handwriting by using the above mentioned writing input sheet.;SELECTED DRAWING: Figure 36;COPYRIGHT: (C)2019,JPO&INPIT
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