1. Types and components of computer systems
By: Reem Hasayen
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2. The Four Parts of a Computer

3. Definition of a Computer
A computer is an electronic device used to process data, converting the data into information that is useful to people

4. What makes a computer powerful?
Speed A computer can
do billions of actions per second.
Reliability Failures are usually due
to human error, one way or another.
Storage A computer can keep
huge amounts of data.

5. Computers Consist of Four Parts
Hardware
Software
Users
Data

6. Hardware Mechanical devices that make up the computer
External Hardware

7. Hardware
Internal Hardware

8. Processing
The procedure that transforms raw data into useful information is called processing
The processor and memory perform this transformation

9. Processor
The computer’s brain, which organizes and carries out instructions from either the user or the software

10. Circuit board Motherboard is an example of a circuit board
Attached to the motherboard are many smaller circuit boards that house many internal devices

11. Software

13. Practice
Software : Types of computer Input Devices

14. Memory ( RAM and ROM)
When you launch a program, it is loaded into and run from memory

15. Random Access Memory (RAM)
Determines a computer’s speed and power

16. Memory Measurements Kilobyte (KB) Megabyte (MB) Gigabyte (GB)
Terabyte (TB)

17. Input Devices
Accept data and instructions from the user or from another computer system

18. Most Common Input Devices
Keyboard
Mouse

19. Output Devices
Return processed data to the user or to another computer system

20. Most Common Output Devices
Monitor
Printer

21. Storage
Holds data permanently

22. Storage Terms Magnetic disk Disk drive Hard disk or hard drive
Diskettes or floppy disks

23. Storage Terms Continued
CD-ROM drive
Compact disks (CDs)
Compact Disk-Read-Only Memory (CD-ROM)
CD-Recordable (CD-R)
CD-ReWritable (CD-RW)
Digital Video Disk (DVD)

24. Software
A set of electronic instructions consisting of complex codes, or programs, that make the computer perform tasks

25. Examples of Software
System software
Application software

26. Five Computer Categories
Supercomputers
Mainframe computers
Minicomputers
Workstations
Microcomputers, or personal computers