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2. (Hardware) 5 (Input Unit) (Central Processing Unit : CPU) (Main Memory) (Secondary Memory) (Output Unit) 3. (Input Unit) Mouse Keyboard 4. Touch Screen Scanner Digital Camera Light Pen POS OMR (Point of Sale (Optical Mark Terminal) Reader) 5. (Central Processing Unit : CPU) 6. 2 (Control Unit) 7. (Main Memory) 2 1. (ROM : Read Only Memory) - - - 8. 2. (RAM : Random Access Memory) - - - - - - - 9. (Secondary Memory) (Magnetic Disk) (Direct Access) 10. (Magnetic Tape) (Sequential Access) (Optical Disk) CD-ROM (Compact Disc Read- Only Memory) 650 (MB) 11. (Output Unit) 2 Soft Copy pixel pixel 640 * 480 , 800 * 600 , 1024 * 786 12. Hard Copy Printer 13. 1. 2. 3. 14. 15. (data processing age) 16. 17. 18. 1. (Hardware) (Case) (Mainboard) (Peripheral) " (Computer System)" 2. (Software) (Program) 19. 2 1) (System Software) 2) (Application Software) 20. 3. / (Data/Information) 4. (Peopleware) 21. - (Operator) - (System) - (Electronic Data Processing Manager) - (Computer user) 5. (Documentation/ Procedure) 22. 1. (source) 2. (sink) 23. 5. (decoding) 6. (noise)