We've got ATMs that run Windows, but I doubt anyone's going to count them as PC's.
Exactly.
I buy and install handheld RF terminals that run Windows components, but none of them would ever be called a PC.
However, I’ve run PC tablets and they were definitely PCs. Wish they were more capable, though.
Nobody uses ATMs as computers. People use iPads as computers, there's even an office suite available. But as I said, as long as they remain slave devices to computers they can't be called computers in their own right.
Uh, actually, they DO count those among total PCs sold and shipped.