The Diagnostic and Statistical Manual of Mental Disorders (DSM) is a comprehensive classification system used by mental health professionals to diagnose and categorize mental disorders. It provides standardized criteria and definitions, ensuring consistency in diagnosis and treatment across various practitioners and settings. First published in 1952, the DSM has undergone several revisions to reflect the evolving understanding of mental health. It serves as a critical resource for clinicians, researchers, and educators, facilitating better communication and understanding of mental health issues within the medical community and beyond.