by Abdul Wahid
A hard drive is a place when you chould save your things in it
A touchscreen is an that the user can control through simple or by touching the screen with one or more fingers. Some touchscreens can also detect objects such as a styes or ordinary or specially coated gloves. The user can use the touchscreen to react to what is displayed and to control how it is displayed (for example by zooming the text size).
In , input/output or I/O is the communication between an (such as a ) and the outside world, possibly a human or another information processing system. are the signals or data received by the system, and are the signals or data sent from it. The term can also be used as part of an action; to "perform I/O" is to perform an . I/O devices are used by a person (or other system) to communicate with a computer. For instance, a or a may be an input device for a computer, while and are considered output devices for a computer. Devices for communication between computers, such as and , typically serve for both input and output.