I believe the answer is: the DSM-5.
the DSM-5 filled with standard classifications that professionals in psychological field can used to identify the type of illness that their patients have. With this classifications, we hoped that there would be less cases when different psychologists offered different conclusions and make the patients confused.
The benefits of a contract are: when ever you come across a problem with your car or find out that what you agreed on with your dealership is not there, you can go back to your contract and state out what you agreed on and it provide you with done sort of security or right
The greatest unifying force of the ottoman empire was a common religion.