The American Psychiatric Association (APA) is the largest psychiatric medical association, founded in 1844. It represents over 36,000 psychiatrists working to ensure humane treatment for those with mental disorders. The APA produces several authoritative resources, including the Diagnostic and Statistical Manual of Mental Disorders (DSM-5), multiple academic journals, and reference books. These resources are made available through the APA's online platform PsychiatryOnline (POL), which allows customizable searching and access across publications. POL offers subscription packages that provide access to current and archived psychiatric literature and reference materials.