INPUT & OUTPUT DEVICES

INPUT & OUTPUT DEVICES:

Below are the examples of pointing devices:

• keyboard.
• Pointing device: - Mouse, Touchpad & Tracker ball.
• Remote Control.
• Joystick and driving wheel.
• Touch Screen.
• Scanner.
• Digital Camera and Video Camera.
• Microphone.
• Sensors.
• Graphics tablet.
• Webcams.
• Light Pens.

INPUT DEVICES: - These are hardware devices that allow data to be input (enter) into a computer.

Keyboard:- The most input device and is used to input text, numbers, and instructions into the computer. They mostly use the QWERTY layout.

NOTE:- Below are the types of keyboards; 

     

• Standard Keyboard:- They have both letters, numbers, and symbols.

Concept Keyboard:- They use Icons and phrases instead of standard letters. They are mostly used in fast foods restaurants. They are waterproof and easy to learn.

• Numeric Keypads: - hey are used to enter numbers only. They are found at ATM machines. Fast entry of data.

POINTING DEVICES: - These are devices the user use to control the position of a pointer (cursor) on the screen by moving the mouse around. 

NOTE: -Below are the 3 examples of pointing devices:

• Mouse.
• TouchPad.
• Tracker ball.

MOUSE: - The mouse is an example of a pointing device used by a user to control the position of a pointer on the screen by moving the mouse around.

USES OF A MOUSE;

• Opening, closing and minimizing software.
• Moving and deleting files.
• Image editing ( controlling the size and position of an image).
• Controlling the position of a pointer

NOTE:- Below are the types of a computer mouse:

• Optical Mouse.

• Wireless (Cordless) Mouse.

• PS2 Mouse.

OPTICAL MOUSE: - The movement of the cursor is detected by reflected light rather then the position of the moving ball. 

CORDLESS (WIRELESS) MOUSE: - They transmit a signal to a USB wireless receiver plugged into the computer. 

PS2 MOUSE:- The movement of the cursor is detected by the movement of the ball.

 NOTE :- The mouse has two buttons:

• Left button:- For selecting/opening an application when clicked twice.
• Right button:- To bring up a drop-down menu and more commands (Cut, Copy).