Originally Posted by anonymouse
Right, all PCs are computers, but it's not the case that all computers are PCs. On the other hand, it's a pretty ill-defined category to begin with, so if someone wants to refer to tablets as personal computers... they are after all computers that are fairly personal, the lines are blurred.
I think categories like desktop, laptop, tablet are much more useful than PC
Yes, describing them like that would be better, but if someone said PC to me, I would think they are talking about a desktop machine