What is a tablet?

What exactly a tablet?

Some say a computer just needs a touch-sensitive screen to be a tablet. Others say a person should be able to write on it with a pen. Still others say it’s screen size that’s important — tablets must fit somewhere between phones and laptops. For some, it’s partly the keyboard — a tablet should have one of those.

Break off the keyboard, leaving only a touch-screen device, he said, and the gadget falls into another buzz-worthy category: the slate.