Chapter 3 CSC134: UNDERSTANDING INPUT & UNDERSTANDING OUTPUT

Salam, again today I want to share some knowledge from what I have learn this chapter 3.  Chapter 3 is devide into two, that is 1) Understanding Input, 2) Understanding Output.

1) Understanding Input
Input is any data and instructions entered into the memory of a computer.  An instuctions can be entered into the computer in the form of programs, commands, and user responses.

The example of Input device are:

1. The keyboard is an input device that contains keys users press to enter data and instructions into a computer. There are two types of keyboard. One is wired keyboards (eg: USB port) and the another one is wireless keyboards (eg: bluetooth and IrDA).
2. The ponting device is an input device taht allows a user to control a pointer on the screen.  A mouse is a pointing device that fits under the palm of your hand  comfortably.  Most widely used pointing device on desktop computer and a mouse can be wired or wireless.  Other ponting device are: Trackball, Touchpad, and Pointing Stick.
3. Video games and computer games use a Game controller as the input device that directs movements and actions of on screen objects.  Example of game controller are:  Gamepads, Joysticks & Wheels, Light guns, Dance pads and Motion-sensing controllers.
4. Voice input is the process of entering input by speaking into a microphone.  Voice recognition is the computer's capability of distinguishing spoken words.
5. Audio input is the process of entering any sound into the computer.  Examples are speech, music, and sound effects.
6. Video input is the process of capturing full-motion images and storing them on a computer's storage medium.
7. Touch screens and Touch-sensitive pads
8. Pen input
9. Digital cameras
10. Scanners and Reading Devices
11. Biometric Input

2) Understanding Output
Output is the data that has been processed into a useful form.  Examples text, graphics, audio, and video.  An output device is any type of hardware component that conveys information to one or more people.  Example of output device are:

• display devices; eg: LCD monitors, Plasma monitors & CRT monitor
• printers; eg: A nonimpact printer:- Ink-jet printers, photo printers, laser printers.  An impact printers:- dot-matrix printer, Line printer.
• speakers, headphones, & earbuds
• data projectors
• interactive whiteboards
• force-feedback game controllers
• tactile output