Patent ID: 8854644

Claim:
An instruction accepting system comprising an information processing apparatus for processing data, and one or a plurality of instruction devices for giving an instruction for processing data to the information processing apparatus, wherein the one or the plurality of instruction devices comprises a storage section for storing identification data of the one or the plurality of instruction devices, the information processing apparatus comprises: a display section including a display surface for contacting the one or the plurality of instruction devices; an instruction accepting section for accepting a first instruction concerning authentication and a second instruction concerning processing of the data, based on a contact position of the one or the plurality of instruction devices and the display surface of the display section; an acquiring section for acquiring first identification data stored in the one or the plurality of instruction devices concerning the first instruction, and second identification data stored in the one or the plurality of instruction devices concerning the second instruction; and an invalidating section for invalidating the second instruction accepted by the instruction accepting section when the first identification data and the second identification data do not coincide with each other.