There is a lot of curiosity as to the difference between Aspergers and PDD-NOS. This link goes to a page at the Autism Society of America, explaining what Asperger's Syndrome is:
http://www.autism-society.org/site/PageServer?pagename=Aspergers
And if you want to see the DSM IV diagnostic criteria for diagnosing Aspergers, here is the link. Scroll down to see the Asperger's diagnosis criteria specifically:
http://www.autismvoice.com/blog/SignsofAutismDiagnosis
Sandra Sinclair,