ANSWERThe ER is the hub of the hospital. This is where people first come in to be seen by a doctor. This is equivalent to that of a foyer in a church or in a house where people will come and meet....
HI, You can find out the solution for this by this link...Check relevant post. May it will help you..http://wiki.answers.com/Q/ER_Diagram_for_a_college_systemRead full page in case deleted...