PERSONAL IDENTIFICATION MEDIUM, DISPLAY METHOD FOR A PERSONAL IDENTIFICATION MEDIUM, TIME AND ATTENDANCE MANAGEMENT SYSTEM, AND CUSTOMER INFORMATION MANAGEMENT SYSTEM

摘要

A personal identification medium enables easily confirming specific information. A time and attendance management system and a customer information management system both use the personal identification medium. An individual information storage unit 41 stores personal information related to an individual. A display 35 displays the personal information. A communication unit 31 receives predetermined information by wireless communication from an external device 3 installed in a specified location. The display 35 displays or stops displaying the personal information when triggered by reception of the predetermined information when entering or leaving the specified location.