Bing found the following results
Autism spectrum disorder - Symptoms and causes - Mayo Clinic
Autism spectrum - Wikipedia
Autism (ASD): Symptoms, Causes, Tests, Treatment & More - Healthline
What is Autism? - Autism Research Institute
What is Autism Spectrum Disorder? | CDC
Autism spectrum disorder (ASD) | Autism Speaks
Autism Spectrum Disorder - National Institute of Mental Health …
What Is Autism? - WebMD
Autism Spectrum Disorder | National Institute of Neurological …
Autism - World Health Organization (WHO)