A tablet computer, or simply tablet, is a complete personal 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 or a digital pen rather than a physical keyboard.
The term may also apply to a "convertible" notebook computer whose keyboard is attached to the touchscreen by a swivel joint or slide joint so that the screen may lie with its back upon the keyboard, covering it and exposing only the screen for touch operation.
Tablet computers and tablet PCsAs of 2010, two distinctly different types of tablet computing devices exist, whose operating systems are of different origin.
Firstly, older tablet personal computers are mainly x86 based,[3] and are fully functional personal computers employing a slightly modified personal computer OS
(Like Windows or Ubuntu Linux) supporting their touch-screen, instead of a traditional display mouse, and keyboard. A typical tablet personal computer needs to be stylus driven, because operating the typical desktop based OS requires a high precision to select GUI widgets, such as a the close window button.
Since mid-2010, new tablet computers with mobile operating systems forego the Wintel paradigm, have a different interface and have created a new type of computing device.[4] These mobile OS tablet computer devices are normally finger driven and use multi-touch capacitive touch screens, instead of the simple resistive touchscreens of typical stylus driven systems (also a standard external USB keyboard can be used).
First of these was the iPad, with Samsung Galaxy Tab and others following. In foregoing the x86 precondition (a requisite of Windows compatibility), the new class of tablet computers use a version of an ARM architecture processor heretofore used in portable equipment (e.g., MP3 players and cell phones) now powerful enough (especially with the introduction of the ARM Cortex family) for tasks such as internet browsing, light production work and gaming.
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