Patent ID: 8094975

Claim:
An information processing system, comprising: a plurality of tags; a tag reader; a digital-pen; and a server, wherein the plurality of tags each hold a unique tag identifier, wherein the tag reader reads the unique tag identifier held in each of the plurality of tags, and outputs the read unique tag identifier, wherein the digital-pen reads location information, which identifies a location where handwriting is made on paper, and outputs the read location information, and wherein the server is configured to: hold work record including information that associates the unique tag identifier recorded in the server in advance with the location on paper; obtain information output from the tag reader and information output from the digital-pen; judge whether or not the read unique tag identifier and a handwriting location identified by the location information are associated with each other; identify which unique tag identifier recorded in advance is associated by the work record with the handwriting location identified by the location information, and judge whether or not the read unique tag identifier and the identified unique tag identifier match in a case where the read unique tag identifier and the handwriting location identified by the location information are judged to be associated with each other; and output information showing a result of judging whether or not the read unique tag identifier and the identified unique tag identifier match.