One who has Asperger's (often shortned to AS) is likely to have social difficulties, and may experience speech delays or problems with motoric skills.
It is important to understand that there is a spectrum, where one can have mild AS or severe AS, and most symptoms can be mild or severe as well.
People with AS have a tendency to be loners due to social difficulties. They may have trouble making eye contact, starting conversations, or they will obsess over a certain subject.
A list of all symptoms would be long and is more fitting to an encyclopedia or psycological handbook than a dictionary.
People with Asperger's Syndrome are not neccesarily less intelligent as stereotypes would have one believe.