A tablet computer, also called a portable computer, is a small, portable personal computer with a touch screen as the basic input device. It has a touchscreen (also known as tablet technology) that allows users to work with a stylus or digital pen instead of a traditional keyboard or mouse. Users can input via built-in handwriting recognition, an on-screen soft keyboard, voice recognition, or a real keyboard (if the model is equipped). Tablet PCs have distinctive features in appearance. Some are like a separate LCD screen, but thicker than the average display screen, and the necessary hardware devices such as hard disks are configured inside. It is as small and light as a laptop, and it can be moved from place to place at any time, giving it more mobile flexibility than a desktop. The biggest feature of the tablet computer is the touch screen and handwriting recognition input functions, as well as powerful pen input recognition, voice recognition, gesture recognition, and mobility. Tablet PCs are LCD screens with touch recognition, which can be used for handwriting input with an electromagnetic induction pen. Tablet PC integrates mobile commerce, mobile communication and mobile entertainment, with handwriting recognition and wireless network communication functions, and is known as the terminator of netbooks. Tablet PCs can be roughly divided into two types according to structural design, namely "variable tablet PCs" with integrated keyboards and "pure tablet PCs" with external keyboards. The tablet computer itself has some new application software built in, and users can input text or hand-drawn graphics into the computer as long as they write on the screen