Tablet computer and tablet 2012

A tablet computer, or a tablet, is a mobile computer, larger than a mobile phone or personal digital assistant, integrated into a flat touch screen and primarily operated by touching the screen rather than using a physical keyboard. It often uses an onscreen virtual keyboard, a passive stylus pen, or a digital pen. 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 of tablet 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. Hybrids have a detachable keyboard so that the touch screen can be used as a stand-alone tablet. Booklets include dual-touchscreens, and can be used as a notebook by displaying a virtual keyboard in one of them. Battery life of three to twelve hours depending on usage pattern.
functions of tablet computers:

1. Wireless mobile browser (using 2G,3G,4G or WiFi)

1. Potential cell phone functions (Messaging, video calling, speakerphone or headset cellphone uses)

1. GPS satellite navigation

1. Stills and video camera functions, photo and video viewing and editing

1. E-book reading (including electronic versions of periodicals)

1. Downloadable apps (games, education, utilities)

1. Portable media player function