Book excerpt: This book provides an overview of the strengths and limitations of the currently available systems for the diagnosis and classification of mental disorders, in particular the DSM-IV and the ICD-10, and of the prospects for future developments. Among the covered issues are: * The impact of biological research * The diagnosis of mental disorders in primary care * The usefulness and limitations of the concept of comorbidity in psychiatry * The role of understanding and empathy in the diagnostic process * The ethical, legal and social aspects of psychiatric classification Psychiatric Diagnosis & Classification provides a comprehensive picture of the current state of available diagnostic and classificatory systems in psychiatry and the improvements that are needed.