A method including providing a PDA having a processor, a memory coupled to the processor, a
GPS receiver coupled to the processor and a RF
transponder capable of communicating using
Internet Protocol; storing user identification information in the memory; storing
medical history information in the memory; determining location using the
GPS receiver; transmitting the determined location to a service using the RF
transponder; and in response to a request of emergency service by a user of the PDA, contacting the service and transmitting an emergency request to the service using the RF
transponder. A PDA comprising a processor; a memory coupled to the processor; a
GPS receiver coupled to the processor; and a
wireless transponder capable of communicating using
Internet Protocol, the PDA being configured to store user identification information in the memory, store
medical history information in the memory, determine location using the GPS
receiver, transmit the determined location to a service using the
wireless transponder, and, in response to a request of emergency service by a user of the PDA, contact the service and transmit an emergency request to the service using the
wireless transponder.