This document summarizes autism spectrum disorders and various therapies used to treat them. It discusses the onset and course of autism as well as importance of early intervention. It then outlines several therapies including applied behavior analysis using principles of reinforcement, punishment and extinction. It also discusses functional behavior analysis, discrete trial training, pivotal response training, and other educational and communication interventions. Social skills training approaches like DIR/Floortime model and TEACCH are also summarized. The document concludes with newer technology tools being applied to autism treatment.