Tablet computers use touchscreens.
 Tablets, being computers, do what other personal computers do, but lack some input/output (I/O) abilities that others have
In 1979, the idea of a touchscreen tablet that could detect an external force applied to one point on the screen was patented in Japan by a team at Hitachi consisting of Masao Hotta, Yoshikazu Miyamoto, Norio Yokozawa and Yoshimitsu Oshima, who later received a US patent for their idea

