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Definition: Surface Book

A combination convertible-hybrid laptop computer from Microsoft. Introduced in 2015, the x86-based Surface Book screen detaches from the keyboard (hybrid) for a stand-alone tablet configuration; however, the screen can also be flipped over and reattached to the keyboard like a convertible laptop. A more powerful discrete graphics processor (GPU) resides in the keyboard, which makes the computer more robust for multimedia editing and similar tasks when attached. See Surface versions, discrete graphics, convertible laptop and hybrid laptop.

Hybrid or Convertible
Available in 13.5" and 15" screen sizes, the Book's screen detaches (top) from the keyboard to function as a stand-alone tablet, or it can be reattached and remain with the keyboard (bottom). (Images courtesy of Microsoft.)