Note: In DSM-4, autism, Asperger's disorder, childhood disintegrative disorder, and pervasive developmental disorder (PDD), were all separate diagnoses, but with the release of the DSM-5 in 2013, they all have been subsumed under the single diagnosis of ASD, hence the word "spectrum" in the name. More than names or labels, I think it is important to remember that ASD comes in many forms and can look quite different from person to person.