The document provides an overview of the changes between editions of the Diagnostic and Statistical Manual of Mental Disorders (DSM). It discusses the evolution of the DSM from earlier editions to the current DSM-5, which was approved in 2013. Some key changes in the DSM-5 include combining and splitting certain diagnoses, adding several new disorders, removing the multiaxial system, and including emerging measures and models for further study. The document outlines these changes in detail and provides background on the development process of the DSM-5.