Input & Output

Input & Output

1. Aspect ratio

   • The ratio of width height of a screen.

2. Bluetooth

   • A wireless (radio) technology that allows devices close to each other to communicate.

3. Braille

   • A form of text used by blind people. it consists of a code of bumps printed on a surface, which can be read by feeling then with your fingers.

4. Contrast Ratio

   • The difference between the darkest black and the brightest white that a display device can produce. More is better.

5. DPI

   • Dots Per Inch- typically used to refer to print quality, but also used to refer to screen resolution.

6. Driver

   • Software used to control a specific hardware device.

7. Interactive Whiteboard

   • A whiteboard connected to a computer that acts like a very large touch screen.

8. LCD

   • Liquid Crystal Display- the most common technology in TV and computer displays.

9. Lumen

   • a unit of measuring light output- typically used to describe the brightness of the image of a data projector.

10. Pixel

    • Small dot-like elements that make up an image.

11. Plug And Play

    • A set of rules about how a peripheral communicates with the computer when connected to it.

12. Response time

    • how quickly a display can respond to a command to completely change a pixel.

13. Touch screen

    • A screen which is also sensitive to touch or pressure and allows you to interact directly with the elements displayed on the screen by touching them.

14. Trackball

    • A large ball that can be moved by hand to change the position of the pointer on the screen.

15. Wifi

    • Networking technology that users radio signals and so does not need wires.