For anyone thrown by the acronym it stands for Ultra Mobile PC. I bought one back in '06, a Samsung Q1. It may have been one of the worst tech purchases I've ever made. It was 7", which wasn't all that bad at the time but slow was it's middle name. I used it maybe 3 times a month for 5 months or so and picked it up one day and couldn't power the screen up. It was so bad I chucked it into a trashcan and never looked back. That was a big time waste of money.