Autism is a developmental disorder characterized by difficulties with social interaction and communication, and by restricted and repetitive behavior.

A syndrome is a set of medical signs and symptoms which are correlated with each other and often associated with a particular disease or disorder.

A disability is any condition that makes it more difficult for a person to do certain activities or interact with the world around them.

A disorder is a functional abnormality or disturbance.

Speech therapy is the assessment and treatment of communication problems and speech disorders.

Occupational therapy is a client-centered health profession concerned with promoting health and well-being through occupation.

Physical therapy (PT), also known as physiotherapy, is one of the allied health professions that treats conditions such as chronic or acute pain, soft tissue injuries, cartilage damage, arthritis, gait disorders and physical impairments typically of musculoskeletal, cardiopulmonary, neurological and endocrinological origins.

Behavioral therapy is an umbrella term for types of therapy that treat mental health disorders.