in reply to Ulf Ayirtahsk Berg

These single-board computers like Raspberry Pi have some really small ones. One of their latest ones is pretty cool, fitting inside a keyboard, quite like the good old Commodore 64. :)

Yes, 'texhnically' there is, from what I've heard of, what they call 'system on a chip' which I think means that all the parts making up what you could call a computer, are inside one of those chip things.