iPhone is a phone, iPad is a tablet, Mac are computers. This is generally what people understand when you talk about the different product segment Apple divides their products in. I'd probably call of them "computing devices", but I think in general it is pretty clear what I'm referring to when I say "Apple's computers", at least to people outside of Hacker News. I think pretty much 0% of the people I spend time with AFK would think "Ah, he must be talking about the iPhone" if I said something like that.
Anecdote: I teach coding to children, including occasional private lessons in client homes. For the latter, families need to supply computers, which one client didn't realize. I managed on the first day by having the two girls pass my personal laptop back and fourth, but I made it clear they'd need to each bring a computer next week.
So I was a bit surprised the following week when one of them showed up with an iPad! But, it had that attachable keyboard and trackpad Apple sells, and it really did work fine in the web-based environments we use.
Broadly speaking, I agree that most people think of Macs as computers and iPads as iPads, but I don't think that distinction is meaningful. Macs and iPads are marketed for most of the same things, and Apple has even begun touting how they have the same chips inside!
