Autism is a developmental disability. Children with autism, also known as autism spectrum disorder or ASD, have social, communication and language problems. They also have restricted and repetitive patterns of behavior, interests, or activities, such as flipping objects, echolalia, or excessive smelling or touching of objects. Autism may be mild or severe. All children with autism don’t have the exact same problems. Children with autism may have the following social and communication skills and common behaviors.