Chapter 2 : COMPUTER SYSTEM

 

Definition computer system

• An electronic device or machine working under a set of introtruction, to accept data,process it into meaningful information and store it for future use.

The system unit

• Case that contains electrnic compenents of the computer used to process data.

The motherboard / system board

• Main circuit board in system unit.
• Cointain expaision slots, processor chips, and memory slots.

Compenent inside the system unit

1. Memory
2. Processor
3. Adapter cards :
• Sound card
• Video card
4. Drive bays
5. Power supply

Hardware

• A machine that accept data (input), process it into useful information (output) and store it (in a secondary storage device) for safekeeping or reuse.

Software

• A set of intruction used to make the computer perform its task.
• Have two several type of software :
• System software
• Application software

Input

• Data or intructions entered into the memory of computer.
• Any hardware compenent that allows users to enter data and intructions.
• Example of input :
1. Keyboard
2. Mouse
3. Digital camera
4. Scanner
5. Microphone
6. Touch screen
7. Joystick
8. Bar code scanner

Output

• Data that has been processed into a useful form.
• Any hardware compenent that component that can convey information to one or more people.
• Example of output :
1. Monitor
2. Headphone
3. Speaker
4. Printer
5. Plotter
6. Projector

Storage / secondary storage

• Hold data, intructions, and information for future use.
• Storage medium is physical material used for storage.
• Example of srorage :
1. Memory card
2. Thumb disk
3. CD/DVD
4. Floppy disk