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A tablet computer, commonly shortened to tablet, is a mobile computer with a touchscreen display, circuitry, and battery in a single device. Tablets come equipped with sensors, including cameras, a microphone, and an accelerometer, and the touchscreen display uses the recognition of finger or stylus gestures replacing the usage of the mouse and keyboard. They usually feature on-screen, pop-up virtual keyboards for typing. Tablets may have physical buttons for basic features such as speaker volume and power, and ports for network communications and battery charging. Tablets are typically larger than smartphones or personal digital assistants with screens or larger, measured diagonally.〔(What makes a tablet a tablet? (FAQ) ) CNET.com May 28, 2010〕〔(Ulefone U7 review ) Every device with diagonal equal 7" or longer is practically tablet PC. Retrieved June 28, 2014.〕 Tablets can be classified according to the presence and physical appearance of keyboards. Slates and booklets do not have a physical keyboard and typically feature text input performed through the use of a virtual keyboard projected on a touchscreen-enabled display. Hybrids, convertibles and 2-in-1s do have physical keyboards (although concealable or detachable), yet they typically also make use of virtual keyboards. The format was conceptualized in the mid-20th century〔See, for example Kubrick (1968) ''2001: A Space Odyssey''〕 and prototyped and developed in the last two decades of that century. In April 2010, the iPad was released, which was the first mass-market tablet with finger-friendly multi-touch and a dedicated operating system. Tablets experienced a rapid rise in popularity and ubiquity and became a large product category.〔(The Dell Venue 8 7000 Series Review ). Anandtech. 23 March 2015. Retrieved 23 March 2015.〕 , tablet use in the world is led by the iPad with a market share of 65.66% and Android tablets with a market share of 32.08%.〔http://gs.statcounter.com/#tablet-os-ww-monthly-201507-201507-map〕 The iPad holds majority use in North America, Western Europe, Japan, Australia, and most of the Americas. Android tablets are more popular in most of Asia (China and Russia an exception), Africa and Eastern Europe. == History == (詳細はpen computing. Electrical devices with data input and output on a flat information display existed as early as 1888 with the telautograph, which used a sheet of paper as display and a pen attached to electromechanical actuators. Throughout the 20th century devices with these characteristics have been imagined and created whether as blueprints, prototypes, or commercial products. In addition to many academic and research systems, several companies released commercial products in the 1980s, with various input/output types tried out: 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Tablet computer」の詳細全文を読む スポンサード リンク
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