The booklet provides background information on the diagnosis and characteristics of autism. A chart portrays the signs and symptoms, followed by the definition of the syndrome by the National Society For Children and Adults with Autism. Associated features are noted along with information on age of onset, etiology, incidence and sex ratio, complications, and differential diagnosis. The diagnostic criteria put forth by the Diagnostic and Statistical Manual of Mental Disorders (Third Edition) DSM-III are also presented in terms of associated features, age at onset, course, impairment, complications, prevalence, sex ratio, predisposing factors, familial pattern, and differential diagnosis. Typical behaviors, such as unusual response to sound and unusual speech patterns, are listed. Programmatic requirements, including early diagnosis and appropriate intervention, highly structured programs, and comprehensive home programming/parent training, are summarized. A brochure entitled "Questions and Answers," which presents practical questions and answers on autism is attached. (CL)