2. Components of a Computer System

3. Components of a Computer System

4. Components of a Computer System Inside the system unit -T-The cabinet Inside it :- Mother Board, CPU, RAM, ROM, Data Bus, Hard Disk, Power Supply Unit etc…

5. Components of a Computer System Processor / CPU (Central Processing Unit ) - Brain of the Computer -S-Speed is measured in Hz (Eg:- 2.4GHz Processor) -C-Control Unit, ALU, Cache memory are in this chip -E-Examples:- Intel Pentium, AMD, Cyrix …..

6. Components of a Computer System Mother Board Main Circuit Board ROM chip, Processor socket, Ram Slot and Chips and other electronic parts are on it

7. Components of a Computer System Power Supply unit Converts Alternative Current (AC) to the Direct Current (DC) and Distribute to the parts like Hard disk, Mother Board, CD ROM Drive etc..

8. Components of a Computer System Peripheral devices All the devices that are connected through the ports back side of the system unit

9. Components of a Computer System Connecting Devices to ports Serial Port

10. Components of a Computer System Connecting Devices to ports Vedio Card Port

11. Components of a Computer System Connecting Devices to ports Parallel Port

12. Components of a Computer System Connecting Devices to ports PS/2 Port

13. Components of a Computer System Connecting Devices to ports USB Port (Universal serial Bus)

14. Components of a Computer System Connecting Devices to ports Ethernet Port (Network Port)

15. Components of a Computer System Storage Registers Cache Main Memory Disk Magnetic Tapes High Cost Low Low Access Time High

16. Components of a Computer System Storage Smallest Unit = 1 bit 8 Bits = 1 Byte 1024 Byte = 1 KB (Kilo Byte) 1024 KB = 1 MB (Mega Byte) 1024 MB = 1 GB (Giga Byte) 1024 GB = 1 Tera Byte (TB) 1024 TB = 1 Peta Byte (PB) 1024 PB = 1 exa byte (EB) 1024 EB = 1 zetta byte (ZB) 1024 ZB = Yotta byte (YB) 1024 YB = 1 xona byte 1024 XB = 1 weka byte (WB) ……….

17. Components of a Computer System Memory Cache Memory Random Access Memory Read Only Memory

18. Components of a Computer System Cache Memory Why :- Holds Data that immediately use by CPU Where :- In The CPU Capacity :- 512 KB, 1 MB etc…

19. Components of a Computer System RAM (Random Access Memory) Why :- Holds Data Temporary (Volatile) Where :- On the Mother Board Capacity :- 128MB, 256,512MB, 1 GB ….

20. Components of a Computer System ROM (Read Only Memory)/ Firmware Why :- Holds basic instructions that the computer wants Where :- On the Mother Board Non-Volatile Memory There are 3 kinds

21. PROM – Programmable ROM Instructions once written can not be changed EPROM – Erasable Programmable ROM Instructions can be change by using a UV (Ultra Violet) light in a ROM Burner machine. EEPROM – Erasable Programmable ROM Instructions can be change by using Electricity Components of a Computer System

22. Components of a Computer System Secondary Storage

23. Components of a Computer System Hard Disk Why :- Holds Data Permanently Where :- In the System unit How data Stored:- By polarizing Magnetic Particles Capacity :- 20GB, 40GB, 80 GB, 160 GB …..

24. Components of a Computer System Hard Disk PlattersHeads Tracks A sector, being the smallest physical storage unit on the disk A cluster can consist of one or more consecutive sectors.

25. Components of a Computer System Floppy Disk Why :- Holds Data Permanently Where :- Floppy drive is in the System unit How data Stored:- By polarizing Magnetic Particles Capacity / Size :- 1.44 MB, 3 ½ inches

26. Components of a Computer System Zip Disk & Jaz Disks Capacity :- Zip 100 to 750 MB Jaz – 1 & 2 GB

27. Components of a Computer System Magneto Optical disk Why :- To store valuable data like films master copy etc… How data Stored:- Using Laser Head & Magnetic Head Capacity :- From 128 MB to …. GB

28. Components of a Computer System Magnatic Tapes Why :- To store data (Used for Backup purpose)

29. Components of a Computer System Compact Disks(CD)/ Digital Versatile Disk (DVD) Why :- To store data out side the computer How data Stored:- Using Laser Lights Capacity :- CD up to 700 MB, DVD 2 GB to 8 GB

30. Components of a Computer System Mechanism of saving data

31. Components of a Computer System Input Devices Key Board Function Keys Numeric Key Pad Wired And Wire less Key Board Available

32. Components of a Computer System Input Devices Mouse X Y

33. Components of a Computer System Input Devices Tracker BallTouch pad

34. Components of a Computer System Input Devices Micro phoneDigital Camera

35. Components of a Computer System Input Devices Scanner OCR (Optical Character Recognition) +

36. Components of a Computer System Input Devices Finger Print Reader

37. Components of a Computer System Input Devices Magnetic Ink Character Recognition (MICR)

38. Components of a Computer System Input Devices Environment Sensors

39. Components of a Computer System Output Devices Cathode Ray Tube (CRT Monitors)

40. Components of a Computer System Output Devices Liquid Crystal Display (LCD Monitors) Less Space Low Power consumption Brightness images No Flickers or Distortion Expensive Limited View angles

41. Components of a Computer System Output Devices Printers Dot Matrix Ink Jet Laser

42. Components of a Computer System Output Devices Speakers Head phones

43. Components of a Computer System Device Drivers Software CDs provided with Devices + +

44. Components of a Computer System Software Computer Hardware Can be seen & touch Software Instructions given to computer Liveware People who work with computers

45. Components of a Computer System Software Software Operating Software Controls all the part of computer & lays between Hardware and Application Software Word processing Application Software System Software Utility programs Enhance the capability of an O/S Spread SheetData Base ManagementPresentationDesktop publishing & Graphic Design Web Design & Development

46. Components of a Computer System Graphical User Interface (GUI) & Command Line Interface (CLI) All the commands should be given by text commands can be given by clicking

47. Components of a Computer System Function of Operating System Hardware Application software Operating System (Works as a Bridge) I am Typing a Letter using MS word As Windows XP bring me to the Desktop

48. Components of a Computer System Booting the Computer POST – Power On Self Test CMOS Setup – BIOS – Basic Input Output System Boot Strap Loader 2008.10.25 08.25 AM