Data flow diagram and flowchart comparison
The systems flowchart below depicts a typical appointment process for Dr. M. Ali, an internal medicine specialist. In Dr. Ali's office, a nurse also functions as a receptionist. "Vital signs" include weight, temperature and blood pressure. The "chart" is the record of all a patient's visits to the doctor. 
Prepare a Level Zero data flow diagram for the same process
Definitions:
Internalization
The process by which individuals take in and accept the norms, values, and beliefs of their society as their own.
Social Influence
The effect that the words, actions, or mere presence of other people have on our thoughts, feelings, attitudes, or behaviors.
Peer Pressure
The influence exerted by a peer group, encouraging individuals to change their attitudes, values, or behaviors to conform to group norms.
Asch Experiment
A series of psychological experiments conducted by Solomon Asch studying if and how individuals yielded to or defied a majority group.
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