A tablet computer, or simply tablet, is a complete mobile computer, larger than a mobile phone or personal digital assistant, integrated into a flat touch screen and primarily operated by touching the screen. It often uses an onscreen virtual keyboard, a passive stylus pen, or a digital pen[citation needed], rather than a physical keyboard.[1][2]
Electrical devices with data input and output on a flat information display have existed as early as 1888.[3] Throughout the 20th century many devices with these characteristics have been ideated and created whether as blueprints, prototypes or commercial products, with the Dynabookconcept in 1968 being an spiritual precursor of tablets and laptops. During the 2000s Microsoft attempted to define the tablet personal computer(tablet PC) product concept[4] as a mobile computer for field work in business,[5] though their devices failed to achieve widespread usage due mainly to price and usability problems that made them unsuitable outside of their limited intended purpose.[6] In April 2010 Apple Inc. released the iPad, a tablet computer with an emphasis on media consumption. The shift in purpose, together with increased usability, battery life, simplicity, lower weight and cost, and overall quality with respect to previous tablets, was perceived as defining a new class of consumer device[7] and shaped the commercial market for tablets in the following year.[8]
The term may also apply to a variety of form factors that differ in position of the screen with respect to a keyboard. The standard form is calledslate, which does not have an integrated keyboard but may be connected to one with a wireless link or a USB port. Convertible notebook computers have an integrated keyboard that can be hidden by a swivel joint or slide joint, exposing only the screen for touch operation. Hybridshave a detachable keyboard so that the touch screen can be used as a stand-alone tablet. Booklets include two touch screens, and can be used as a notebook by displaying a virtual keyboard in one of them.
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