Asperger syndrome (often Asperger's syndrome) is a form of autism spectrum disorder. It affects the way in which a person understands, talks and acts with other people. A person who has Asperger syndrome may not fit in well with other people, and may be unable to act like everyone else in different social situations. Neurotypical (or NT) is a term that was coined in the autistic community as a label for those other people who are not on the autism spectrum. Asperger syndrome is thought to manifest as a developmental disorder, and is not considered a mental illness. Most adults with Asperger syndrome can learn how to make friends, do useful work, and live successful lives. Asperger syndrome is considered to be at the highest functioning end of the Autism spectrum disorders.