Input Devices

a) INPUT DEVICES FOR TEXTS

- You can enter data such as text and commands into a computer by pressing the keys on the keyboard.

- You can press the keys of a virtual keyboard on the screen.

- An optical reader is a device that uses a light source to read characters, marks and codes and then converts them into digital data that a computer can process.

b) INPUT DEVICES FOR GRAPHICS

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

- A digital camera allows you to take pictures and store the photographed images digitally.

c) INPUT DEVICES FOR AUDIO

- Audio input is the speech, music and sound effects entered into the computer. This can be done using input devices such as a microphone and digital musical instruments like the Musical Instrument Digital Interface (MIDI) keyboard.

d) INPUT DEVICES FOR VIDEO

- Video input is input of motion images captured into the computer by special input devices.

- A Closed-Circuit Television (CCTV) video camera is a type of digital video camera that enables a home or small business user to capture video and still images.

- A webcam is any video camera that displays its output on a web page.

- A digital video camera allows you to record full motion and store the captured motion digitally.

e) POINTING DEVICES

- A pointing device is another form of input device. Pointing devices such as a mouse, trackball, graphics tablet and touch screen are used to input spatial data into the computer.

- Spatial data refers to data that is continuous and multi-dimensional.

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