If you want the smallest possible device with a nearly full sized keyboard, you should get a Sony Vaio P. They're no longer made, but they are "real computers"

If you want the smallest possible device with a nearly full sized keyboard, you should get a Sony Vaio P. They're no longer made, but they are "real computers", being rather slow netbooks. They'll fit in a jeans pocket barely comfortably, and in other pants' pockets rather comfortably.