The<unk>  is a key aspect of psychiatry and other<unk>  health professions and an important issue for users and providers of<unk>  health services. There are currently two widely established systems for classifying<unk>  illness - Chapter V of the International Classification of Diseases (ICD-10) produced by the World Health Organization (WHO) and the Diagnostic and Statistical Manual of<unk><unk>  (DSM-IV) produced by the American Psychiatric Association (APA). Both list categories of<unk>  thought to be distinct types, and have deliberately converged their codes in recent revisions so that the manuals are often broadly comparable, although significant differences remain. Other classification schemes may be in use more locally, for example the Chinese<unk> . Other manuals are used by those of alternative theoretical persuasions, such as the Psychodynamic Diagnostic Manual. Generally there is a significant scientific debate about the relative merits of a categorical system or a dimensional system (also known as a continuum or spectrum system), as well as significant controversy about the role of science and values in classification schemes and the professional, legal and social uses to which they are put.
Classification of mental disorders
Psychosis classification
Personality disorder classification
Delirium classification
Traumatic brain injury classification
Autism epidemiology
Anxiety classification
Amnesia classification