The DSM (Diagnostic and Statistical manual of Mental Disorders) - Originally published in 1952 by the American Psychiatric Association. The 5th Edition was published in 2013.
157 disorders are catagorised under 18 different subcatagories, for example Schizophrenia is listed under Schizophrenic spectrum and other Psychotic disorders.
This classification system is used in America.
The ICD (International classification of Diseases) - currently in its 10th edition and is published by the World Health Organisation (WHO).
This is very similar to the DSM, and is used outside of America. The ICD identifies 7 sub-types under the catagory of Schizophrenia, Schizotypal and delusional disorders.
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