Click this sentence for something I wrote detailing exactly what PDDNOS does and doesn't mean officially under current criteria.
Someone in this thread (I didn't check the name) was talking about how they seemed different than others in a support group.
In response to that I would just caution you not to use the existing diagnoses as a good way to categorize the subtypes of autism that you can detect just from everyone's personal experience of how you differ. They weren't written with that in mind, and given that there's dozens or maybe hundreds of the real-experience subtypes, and if you stretch it you only get maybe... AS, HFA, MFA, LFA, and PDDNOS, you just can't make five official (or official-ish if you count functioning levels) subtypes do the work for categorizing dozens or hundreds of real-life-experience subtypes.
As an example my official label is autistic disorder. (Not any functioning label generally added. But sometimes they'll say severe or something over my objections.) I am different from most online autistic people (and from most people who come to conventions or support groups) regardless of diagnosis. But a small number are similar to me. And those people have seriously received all five of the possible labels -- AS, HFA, MFA, LFA, and PDDNOS. So I don't feel like my official labels really have any bearing on whether someone is like me or not. (AS may be slightly unlikely but far from unheard of, the person more like me than anyone in the world has been diagnosed as both AS and PDDNOS although she probably meets autism criteria too (there's just a bias away from autism and towards AS when diagnosing adults).
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"In my world it's a place of patterns and feel. In my world it's a haven for what is real. It's my world, nobody can steal it, but people like me, we live in the shadows." -Donna Williams