What are the differences between a slate pc, ultrabook, and a tablet?

The differences between ultra-book, tablet and slate PC  are mentioned as follows:-

Ultra-book is the notebook structure thin and slim device whereas tablets are type of computer shaped laptops in small size and slate PC has detachable display screen and is a replacement of tablet .Ultra-books have large and handy keyboards, tablets have touchscreen and no keyboard presence whereas slate PC has the touchscreen operated through stylus or fingers.Ultra-book have good storage space while tablets and slate PC's have less storage space in comparison.

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