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INTRODUCTION TO INFORMATION TECHNOLOGY- IT Basics

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INTRODUCTION TO INFORMATION TECHNOLOGY- IT Basics
MOTHERBOARD
CPU
RAM & ROM
SRAM
DRAM
Printer
Keyboard
Keyboard
Modem
Secondary Storage Devices

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INTRODUCTION TO INFORMATION TECHNOLOGY- IT Basics

  1. 1. TRINITY INSTITUTE OF PROFESSIONAL STUDIES Sector – 9, Dwarka Institutional Area, New Delhi-75 Affiliated to Institution of G.G.S.IP.U, Delhi IT Basics Keywords : Memory, CPU B.COM INTRODUCTION TO INFORMATION TECHNOLOGY BCOM 107
  2. 2. TRINITY INSTITUTE OF PROFESSIONAL STUDIES Sector – 9, Dwarka Institutional Area, New Delhi-75 Computer Hardware Software Application Software System Software CPU Memory I/O Etc.
  3. 3. TRINITY INSTITUTE OF PROFESSIONAL STUDIES Sector – 9, Dwarka Institutional Area, New Delhi-75 Fig: Computer
  4. 4. TRINITY INSTITUTE OF PROFESSIONAL STUDIES Sector – 9, Dwarka Institutional Area, New Delhi-75 MOTHERBOARD
  5. 5. TRINITY INSTITUTE OF PROFESSIONAL STUDIES Sector – 9, Dwarka Institutional Area, New Delhi-75 CPU
  6. 6. RAM Memory chips
  7. 7. TRINITY INSTITUTE OF PROFESSIONAL STUDIES Sector – 9, Dwarka Institutional Area, New Delhi-75 Affiliated to Institution of G.G.S.IP.U, Delhi RAM & ROM
  8. 8. TRINITY INSTITUTE OF PROFESSIONAL STUDIES Sector – 9, Dwarka Institutional Area, New Delhi-75 SRAM
  9. 9. TRINITY INSTITUTE OF PROFESSIONAL STUDIES Sector – 9, Dwarka Institutional Area, New Delhi-75 DRAM
  10. 10. TRINITY INSTITUTE OF PROFESSIONAL STUDIES Sector – 9, Dwarka Institutional Area, New Delhi-75 Ports CPU RAM Disk controller Graphics card Sound card Network card Printer Mouse Keyboard Modem Monitor Speakers bus Computer Fig: Schematic Diagram of a Personal Computer...
  11. 11. TRINITY INSTITUTE OF PROFESSIONAL STUDIES Sector – 9, Dwarka Institutional Area, New Delhi-75 Secondary Storage • Stores information • Non-volatile, permanent storage • Characteristics – Media – Capacity – Access time
  12. 12. TRINITY INSTITUTE OF PROFESSIONAL STUDIES Sector – 9, Dwarka Institutional Area, New Delhi-75 Secondary Storage Devices  Two major types of secondary storage device 1. Serial Devices – Magnetic tapes (very fast sequential access) 2.Direct Access Storage Devices (DASDs) – Magnetic Discs Hard disks (high capacity, low cost, fast) Floppy disks (low capacity, lower cost, slow) – Optical Disks CD-ROM = (Compact disc, read-only memory
  13. 13. TRINITY INSTITUTE OF PROFESSIONAL STUDIES Sector – 9, Dwarka Institutional Area, New Delhi-75 Limitation of Secondary Devices
  14. 14. TRINITY INSTITUTE OF PROFESSIONAL STUDIES Sector – 9, Dwarka Institutional Area, New Delhi-75 Magnetic Tape • Sequential access • Commonly used for backing-up data • Very large capacity • Types of magnetic tape – Tape cartridges – Magnetic tape reels
  15. 15. TRINITY INSTITUTE OF PROFESSIONAL STUDIES Sector – 9, Dwarka Institutional Area, New Delhi-75 Magnetic Tape
  16. 16. TRINITY INSTITUTE OF PROFESSIONAL STUDIES Sector – 9, Dwarka Institutional Area, New Delhi-75 Magnetic Tape • Plastic ribbon 1/2 inch or ¼ inch wide • 50 to 2400 feet long • Coated with magnetic material such as iron oxide or chromium dioxide. • Data stored in form of tiny magnetized(1) or non magnetized spots(0) • Can be erased and reused in definitely • Information can be read many times without affecting data
  17. 17. Magnetic Tape • What is magnetic tape? • Thin layer of material capable of storing a magnetic signal • Usually contains Iron Oxide • Protected by backing layer called the “Substrate”
  18. 18. Examples of Magnetic Media • Some you are probably familiar with: • Cassette tapes • VHS video tape • Computer Tape • 8-track • DAT
  19. 19. Magnetic Tape Types • Tape cartridges – Backup tape for microcomputer – Capacities range from 120 MB to 5 GB – Digital audio tape (DAT) • Tape reels – Minicomputer and mainframe – 1/2 inch wide and 1/2 mile long – Stores 1600 to 6400 cpi

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