The present invention relates to maintaining personal information for use by medical service providers. The user may display information (6) for use by medical service providers; allow another user to edit information (7) stored on the device (4); exit (8) an auto-run application and allow disengagement of the device (4) from processor means; or, enter into a memory device (9) not necessarily subjected to restricted access. The device when used in conjunction with a data processing system for displaying personal information carried thereon may use an AUTORUN feature. In editing ' stored information on device (4), a security password is required. Using layered security, a second user being a service provider might have digital signature based access to a part of the data without using the user password. The patient may authorize the practitioner to edit/view the information for the first time giving the particular practitioner permanent access to selected features of the patients device.