Input Device In Computer Systems - Technology369kk

Input Devices in Computer Systems

Input devices are essential components that allow users to interact with a computer by providing data and commands. Below are some common input devices:

1. Keyboard:

   • A fundamental input device used for data entry through keys.
   • Keyboards typically come in two sizes: 84 keys and 101/102 keys, with some variations including 104 and 108 keys.
   • Types:
     • QWERTY Keyboard: The most commonly used layout, named for the first six letters in the top row.
     • AZERTY Keyboard: Primarily used in France, featuring a different arrangement of keys for specific languages.

2. Mouse:

   • A popular pointing device that controls the cursor on a graphical user interface (GUI).
   • It features two buttons (left and right) and a wheel for navigation.

3. Joystick:

   • A pointing device that allows users to move the cursor in multiple directions, often used in gaming applications.

4. Light Pen:

   • A stylus-like device used to interact directly with the screen by selecting menu items or drawing.

5. Scanner:

   • An input device that converts physical documents and images into digital format for display and editing on a computer.

6. Barcode Reader (BCR):

   • A device that reads barcoded data, commonly used for inventory and product identification by converting barcodes into alphanumeric values.

7. Microphone:

   • An audio input device that captures sound vibrations and converts them into digital audio signals for recording or communication.

8. Optical Mark Reader (OMR):

• A specialized scanner that detects marks made by pen or pencil, widely used in examination answer sheets for multiple-choice questions.