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Department Of Computer Science Information Technology

Department Of Computer Science Information Technology. Presented To Respected Sir Imdad Ullah. Presented By. Nosheen Shoukat BS-IT-41 Muhammad Tayab BS-IT-49 Ramsha Mukhtar BS-IT-36 Meha Shahid BS-IT-16 Haroon Saeed BS-IT-21 Izhar Ahmad BS-IT-33

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Department Of Computer Science Information Technology

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  1. Department Of Computer ScienceInformation Technology

  2. Presented ToRespected Sir Imdad Ullah

  3. Presented By Nosheen Shoukat BS-IT-41 Muhammad Tayab BS-IT-49 Ramsha Mukhtar BS-IT-36 Meha Shahid BS-IT-16 Haroon Saeed BS-IT-21 Izhar Ahmad BS-IT-33 Naeem Sheikh BS-IT-18

  4. INPUT Data or instruction given to computer by user. Signals received by computer before processing Audio input Video input

  5. Input Devices Devices used to enter data into computer Devices which help computer to receive data by user before processing Examples: • Keyboard • Mouse • Joy sticks • Digital camera

  6. Keyboard Most commonly used input device Buttons are called keys Examples: • QWERTY Keyboard • Enhanced Keyboard • Cordless keyboard • Portable Keyboard

  7. Mouse • Small and lightweight • It has only two or three buttons Examples: • Mechanical mouse • Optical mouse • Wireless/cordless mouse

  8. Joy Stick It consists of base and stick Base consists of buttons to perform tasks Stick used to control the cursor

  9. Digital Camera • Used to store image • Allows user to edit image

  10. Types of camera • Studio Camera • Field Camera • Point-and-shoot Camera

  11. Pen Input • It look like small tiny ink pen • Uses pressure instead of ink • Digital Pen, Stylus

  12. Touch Screen • Touch sensitive Device • It works by touching the area of screen

  13. OUTPUT • Information received by user from computer • Signals which user gets after processing • Soft copy output (shown on screen) • Hard copy output (printed on paper)

  14. Output Devices Devices used to display information to the user Devices that help user to receive information by computer after processing • Monitor • Printer • Speakers • Projector

  15. Printer • A printer prints characters, symbols and graphics on papers • Used in business to print documents • Printed output is called hard copy

  16. Types Of Printers • Impact Printers • Non-impact printers

  17. Types Of Impact Printer • Dot matrix Printers • Line Printers • Daisy wheel Printers

  18. Dot matrix Printer It is impact printer Produces printed images when tiny pins strike inked ribbon It uses 100 to 150 DPI 200 to 300 character per minute

  19. Line Printer • Fast impact printer • Its speed measured in line per minute (some printer print 3000 line per minute) Types Band printer Chain printer

  20. Daisy Wheel Printer • Similar to typewriter • Uses print wheel called daisy wheel

  21. Types Of Non-Impact Printer • Inkjet Printers • Laser Printers • Photo Printers

  22. Inkjet Printer • It prints by spraying tiny drops of liquid ink on paper • It can print 1 to 6 pages per minute • It is inexpensive

  23. Laser Printer • It creates images on paper by laser beam • LASER stands for Light Amplification Emission Of Radiation • Density of these dot ranges from 300 to 2000 dots per inch • It is also called Page Printer

  24. Photo Printers It is color printer Also called Snapshot printer Specially designed to print high quality photographs Some photo printers have built-in LCD color screen

  25. Monitor Most commonly used output device Output on monitor is called soft copy

  26. Speakers Produces audio output Speakers produce music, speech or other sound like beep

  27. Projectors It projects the output of computer screen on a larger screen It is used to deliver lecture to many students in class

  28. Thanks

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