The document discusses autism as a developmental disability characterized by impaired social interaction and communication skills and restrictive and repetitive behaviors. It defines autism according to the IDEA and provides examples of traits such as lack of eye contact, delayed speech, repetitive behaviors, and unusual responses to sensory experiences. The document notes that autism is more prevalent now (1 in 88) than in the past, can be diagnosed using tools like the ABC and CARS, and can be treated with programs like ABA therapy, TEACCH, and sensory integration therapy.