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.COMPUTER IPUT DEVICES

1. Look at the picture. Guess the functions of the input devices, give the definition of input devices in one sentence and present

Definition:

Input devices:

A computer keyboard - is a peripheral input device modeled after the typewriter keyboard which uses an arrangement of buttons or keys to act as mechanical levers or electronic switches.

A computer mouse - (plural mice, sometimes mouses) is a hand-held pointing device that detects two-dimensional motion relative to a surface. This motion is typically translated into the motion of a pointer on a display, which allows a smooth control of the graphical user interface of a computer.

A joystick - is an input device consisting of a stick that pivots on a base and reports its angle or direction to the device it is controlling. Joysticks are often used to control video games, and usually have one or more push-buttons whose state can also be read by the computer.

A digital - camera is a camera that captures photographs in digital memory.

A webcam - is a digital video device commonly built into a computer.

A scanner- is a device that captures images from photographic prints, posters, magazine pages, and similar sources for computer editing and display.

A scanner - is a device that captures images from photographic prints, posters, magazine pages, and similar sources for computer editing and display.

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microphone - (mic for short) is an electronic device that converts audio waves into electronic signals, which is then taken by the computer as an input.

A graphics tablet - (also known as a digitizer, digital graphic tablet, pen tablet, or digital art board) is a computer input device that enables a user ro hand-draw images, animations and graphics, with a special pen-like stylus, similar to the way a person draws images with a pencil and paper.

A touchscreen - or touch screen is the assembly of both an input ('touch panel¹) and output ('display') device. The touch panel is normally layered on the top of an electronic visual display of an information processing system.

A barcode reader - (or barcode scanner) is an optical scanner that can read printed barcodes, decode the data contained in the barcode and send the data to a computer.