The American Psychiatric Association’s Diagnostic and Statistical Manual of Mental Disorders (DSM-5), which was updated in 2013 and is the standard classification and diagnostic resource used in American psychiatry, includes twenty specific categories of mental disorders. Examples include neurodevelopmental disorders such as attention-deficit/hyperactivity disorder (ADHD) and autism spectrum disorders, depressive disorders such as major depressive disorder,anxiety disorders such as generalized anxiety disorder (GAD) and social anxiety disorder (SAD), and trauma- and stressor-related disorders such as post-traumatic stress disorder (PTSD). The International Classification of Diseases (ICD-10), developed and published by the United Nations’ World Health Organization (WHO), provides its own definitions and classifications, which are commonly used by mental health professionals throughout the world. (Opposing Viewpoints)