Surface Book
Surface Book
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Surface Book

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Surface Book

The Surface Book is a 2-in-1 PC designed and produced by Microsoft, part of the company's Surface line of personal computing devices, and released on October 26, 2015. Surface Book is distinguished from other Surface devices primarily by its full-sized, detachable keyboard, which uses a dynamic fulcrum hinge that expands when it is opened. The keyboard contains a second battery, a number of ports and an optional discrete graphics card used when the screen part, also dubbed as the clipboard by Microsoft, is docked to it. Unlike Surface Pro devices, which are marketed as tablets, the Surface Book is marketed as a laptop, Microsoft's first device marketed as such. Unlike the Surface Laptop devices, the two parts are detachable. It was succeeded by Surface Book 2.

Surface Book was announced at the Windows 10 Devices Event by Microsoft on October 6, 2015, alongside the Surface Pro 4, and went on sale shortly thereafter. At the announcement, Panos Panay, corporate vice president for Surface Computing at Microsoft, initially presented the device as a laptop and positioned it as a competitor to the MacBook Pro, before revealing that it was a hybrid device, with a screen that could be detached and used with just the Surface Pen.

In October 2016, Microsoft announced an updated Surface Book with a new Nvidia GeForce GTX 965M GPU and additional battery life over the original model.

In May 2017, Microsoft revealed the successor to the Surface Book, the Surface Book 2, which was itself replaced by the Surface Book 3 in 2020.

The Surface Book's design was influenced by a goal to design a 2-in-1 convertible tablet that could be folded like a laptop, and not require the keyboard to be heavier than the tablet portion in order to support and balance the tablet portion. To reach this goal, the Surface development team developed a special hinge on the keyboard that would increase the footprint of the device when opened, thus maintaining the balance without increasing the weight differential between the two parts. The hinge is accompanied by muscle wire locks that secure the tablet portion to the keyboard. The wires are made from nickel titanium—an alloy that contracts when exposed to an electrical current; pressing a release button on the keyboard sends an electrical impulse through the wires that attach or release the clips. The team also worked with the Microsoft team developing Windows 10 to implement a switchable graphics system, where the tablet would be able to switch to a discrete graphics card located within the keyboard when docked, and revert to internal graphics when undocked.

The Surface Book's use cases are reflected by several design decisions, such as referring to the tablet portion as being a clipboard. Additionally, while the device as a whole is rated as having 12 hours of battery life, this capacity is divided between two separate batteries within the clipboard and keyboard portions: the clipboard has a 4-hour battery, while the base has 8-hour. The Surface Book's keyboard is considered a standard component of the device, and is bundled with all models.

The device consists of a tablet portion with a 13.5 inches (34 cm), 3000×2000 resolution display, and a keyboard attachment. That allows it to function similarly to a traditional laptop. Both components are constructed from machined magnesium. The Surface Book's keyboard utilizes a dynamic fulcrum hinge, which compresses when closed, and expands outwards when opened. The hinge design allows the tablet portion to be held up at an angle resembling a traditional laptop screen without the use of a kickstand, a supporting part found in Surface-series devices, and increases the physical room between the keyboard and the tablet.

Surface Book is the first Surface-family 2-in-1 to be shipped with a keyboard. Contrary to a Type Cover optional keyboard accessory of other Surface tablets, Surface Book's keyboard is a thick and sturdy part, capable of folding back behind the display. It contains two USB 3.0 ports, full-size SD card slot on the left, Mini DisplayPort and SurfaceConnect port on the right, has an integrated additional battery and an optional Nvidia discrete GPU with 1 GB of video memory. It can be used for non-demanding tasks such as web browsing without the connected keyboard part, and when laptop convenience, extended connectivity, performance, and battery life are needed — with the keyboard attached.

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