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.