1. Pointing Device
1.1. Pointer
1.1.1. Small symbol on the screen whose location and shape change as a user moves a pointing device.
1.2. Mouse
1.2.1. Pointing device that fits under the palm of your hand.
1.3. Touchpad
1.3.1. Small, flat, rectangular pointing device that is sensitive to pressure and motion.
1.4. Trackball
1.4.1. Stationary pointing device with a ball on its top or side
2. Touch Screen
2.1. A display device that allows a user to interact with a computer by touching areas on the screen.
3. Pen Input and Graphic Tablet
3.1. Pen Input
3.1.1. Is an input device in form of digital pen or smart pen which captures the handwriting or brush strokes of a user and converts handwritten analog information into digital data
3.2. Graphic Tablet
3.2.1. Is an electronic plastic board that detects and converts movements of a style or digital pen into signals that are sent to the computer
4. Definition
4.1. Any data and instruction entered into memory of a computer.
5. Keyboard
5.1. Definition
5.1.1. An input device that contains keys you press to enter instructions into a computer or mobile device.
5.2. Main Parts
5.2.1. Typing area
5.2.2. Function keys
5.2.3. Toggle key
5.2.4. Navigation key
5.2.5. Media control buttons
5.2.6. Internet control buttons
5.2.7. Other special keys
5.3. Ergonomic keyboard
5.3.1. An ergonomic keyboard has a design that reduces the chance of repetitive strain injuries (RSIs) of wrist and hand
5.3.2. Ergonomics incorporates comfort, efficiency, and safety in the design of the workplace