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Input and Output Devices.

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This ppt is about input and output devices of the computer.
Will be helpful in gaining knowledge.

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Input and Output Devices.

  3. 3. KEYBOARD • Keyboard is the most common input device used for entering text data directly into a computer. • A computer keyboard is similar to that of a typewriter, but it has additional keys as well. • The most common available computer keyboard has 104 keys. 3
  4. 4. MOUSE  Mouse is another popular input device used with modern computers.  It is basically a pointing device used to provide input in graphic-user interface operating systems.  It is a small palm size box, which appears a bit like a mouse. 4
  5. 5. DIGITAL CAMERA • Digital cameras are the latest type of cameras, which records and stores photographic images. • Many current models of digital cameras are also capable to capture sound or video, in addition to still images. • The number of photographs that a camera can shoot depends on the memory capacity of the camera. 5
  6. 6. MICROPHONE  Microphone is the commonly used audio input device in computers. It is used to amplify or record the sounds using computers.  These are the devices that transfer sound inputs to the computer.  Microphones are becoming very common due to the trend of chatting and video conferencing. 6
  7. 7. TOUCH SCREEN • Touch screen is a special input device, which only needs a finger touch to supply input to the system. • Touch screen are the monitors with a special pressure sensitive screen that detects the touch of a finger on a particular point of time. • Most of the items are coming in market with touch screen ability. 7
  8. 8. OPTICAL MARK READER  OMR is a special type of optical scanner, which reads presence or absence of a mark made with pen/pencil.  OMRs are very economical devices and can read up to 10000 documents per hour.  OMRs use laser beam scanning technology and process huge volume of data in a very short span of time. 8
  9. 9. SCANNER • Scanner is a very popular input device, which works more like a photocopy machine. • They are mainly used to transfer printed or handmade pictures, photographs and text- document into computer. • Every scanner has a variety of specifications, including resolution, color depth and speed. 9
  10. 10. SMART CARDS  Smart cards are electronic cards, which are small in size and are made of some plastic material with an embedded computer chip that store and transacts data.  These cards are read by card reader, which normally acts as a scanner.  Banks normally use the smart cards. Each card is having a unique number, which has some coded data contained in it. 10
  12. 12. COMPUTER MONITOR A monitor is a softcopy output device that produces output in the form of a picture on the screen. It is just like a television screen usually used to see programs on a computer. At present, computer monitors are available in a variety of shapes, designs and colors. 12
  13. 13. SPEAKERS  Speakers also produce softcopy output in the form of sounds.  Speakers are used to play sound in computers. They may be built-in or externally connected to your system.  Speakers allow user to listen to music and hear sound effects and spoken text using computer. 13
  14. 14. PRINTER Printers are the most important output devices, which produce hardcopy output on different type of papers. Two common wireless technologies for printing are Bluetooth and Infrared. In Bluetooth printing, a computer or device transmits output to a printer via radio waves and in Infrared printing, a printer communicates with a device using infrared light waves. 14
  15. 15. PLOTTER Plotter is an output device that draws pictures on a large piece of paper. Plotters are mainly used to print maps, layouts, banners, and reports that are very large in size. The main advantage of plotter is producing line drawings with a very high degree or accuracy. 15
  16. 16. THANKS By VIPUL GUPTA BBA Sem.1st 16

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This ppt is about input and output devices of the computer. Will be helpful in gaining knowledge.


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