I wonder how they count them (Score 2, Interesting)

I don't buy "a desktop", but I buy parts, often from different merchants. I doubt a user-assembled desktop counts for these numbers since it's not assembled by a big name OEM. For laptops, notebooks, etc., you have to buy the package deal and buy a machine with a name on it, so buying one would surely be counted as a notebook purchase. Since my desktop wasn't purchased as a whole machine, I wonder if it was counted.