The PHR is an electronic health record which consists of health data and the treatment provided for the client. The client can enter the data and maintain these health records. It is easy to carry and helps healthcare providers provide treatment in emergency conditions. Health care facilities maintain an EMR for each client. The client does not have access to these records in the air. Clinical health care informatics seeks to transform client health by educating and training health care professionals. It does not help to provide emergency treatment to the client while traveling. RHIO oversees the exchange of client's information among the patient's healthcare providers and across geographic areas.