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NAME :
MATRIX NO :
COURSE : INFORMATION TECHNOLOGY
MOUSE
USES
• To control the movement of a pointer on the
screen when it is moved horizontally over a
flat surface.
• Buttons on ...
ADVANTAGES
• Ideal for use with
dekstop computers.
• Usually supplied with a
computer so no
additional cost.
• All compute...
KEYBOARD
USES
• The standard QWERTY keyboard is the
commonest way to enter text and numerical
data into a computer.
• Each individu...
ADVANTAGES
• Reliable for data input of
text and numbers.
• Usually supplied with a
computer so no additional
cost.
• Spec...
DISADVANTAGES
• Users may be slow for not
very accurate typists.
• Slow for accessing menus
etc. and difficult to use if
y...
DIGITAL CAMERA
USES
• Used to take photographs like a normal camera but produce
digital images instead of using film.
• The light passing...
ADVANTAGES
• No film is needed and
there are no film
developing costs.
• Unwanted images can be
deleted straight away.
• I...
FLASH DRIVE
USES
• The USB flash drive stores digital material of any kind,
be it videos, powerpoints, documents and etc.
• The storag...
ADVANTAGES
• Faster read and write
compared to traditional hard
disk drives.
• Smaller size.
• Less prone to damage.
• Che...
MICROPHONE
USES
• This is used for the input of sound which is
then digitised by the computer. The digital
audio can be saved for pla...
ADVANTAGE
• Voice recognition software
can be used to convert
your voice into text or to
control menu options on a
phone s...
DISADVANTAGES
• Stored audio files can take
up a lot of memory.
• Voice commands can be
difficult to recognise by
the soft...
THE END
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Input Devices

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Input Devices

  1. 1. NAME : MATRIX NO : COURSE : INFORMATION TECHNOLOGY
  2. 2. MOUSE
  3. 3. USES • To control the movement of a pointer on the screen when it is moved horizontally over a flat surface. • Buttons on the mouse let you select options from menus and drag objects around the screen.
  4. 4. ADVANTAGES • Ideal for use with dekstop computers. • Usually supplied with a computer so no additional cost. • All computer users tend to be familiar with using them. DISADVANTAGES • They need a flat space close to the computer. • The mouse cannot easily be used with laptop, notebook or palmtop computers. (These need a tracker ball or a touch sensitive pad called a touch pad.)
  5. 5. KEYBOARD
  6. 6. USES • The standard QWERTY keyboard is the commonest way to enter text and numerical data into a computer. • Each individual key is a switch, which when pressed, sends a digital code to the computer.
  7. 7. ADVANTAGES • Reliable for data input of text and numbers. • Usually supplied with a computer so no additional cost. • Specialised keyboards are available.
  8. 8. DISADVANTAGES • Users may be slow for not very accurate typists. • Slow for accessing menus etc. and difficult to use if you want to move objects around the screen. • Difficult for people unable to use keyboards through paralysis or muscular disorder.
  9. 9. DIGITAL CAMERA
  10. 10. USES • Used to take photographs like a normal camera but produce digital images instead of using film. • The light passing through the lens is digitised by special light sensitive sensors. The image is stored on memory chips in the camera and can then be transferred to a computer. • The resolution of such cameras is increasing rapidly and professional models have become standard in photo- journalism. Images are usually compressed as jpeg's to save memory. • Advanced models have removable memory cards to increase the camera's storage capacity. Images can be transferred to a computer by cables or memory card readers.
  11. 11. ADVANTAGES • No film is needed and there are no film developing costs. • Unwanted images can be deleted straight away. • Images are already digital and can easily be transferred to a computer and edited or transferred over the Internet. • Special image editing software can allow a huge range of adjustments and special effects to be tried. DISADVANTAGE • Images often have to be compressed to avoid using up too much expensive memory.
  12. 12. FLASH DRIVE
  13. 13. USES • The USB flash drive stores digital material of any kind, be it videos, powerpoints, documents and etc. • The storage of the USB flash drive in presented in megabytes, gigabytes or terabytes.(MB, GB, or TB, respectively.) • The more bytes, the more storage. There are no public USB flash drives yet that can hold over 1,023 TB.(1 TB = 1024 GB, 1 GB = 1024 MB, 1 MB = 1024 KB, 1 KB = 1024 B. • One byte can hold any amount of bits, that depends on the program, the file or the OS.
  14. 14. ADVANTAGES • Faster read and write compared to traditional hard disk drives. • Smaller size. • Less prone to damage. • Cheaper than traditional drives in small storage capacities. • Uses less power than traditional hard disk drives. DISADVANTAGES • Flash memory cells have a limited number of write and erase cycles before failing. • Most flash drives do not have have a write-protection mechanism. • Smaller size devices, such as flash drives make them easier to lose. • Currently costs a lot more per gigabyte than traditional hard drives forlarge storage capacities. • May require a special version of a program to run on a flash-based drive to protect from prematurely wearing out the drive.
  15. 15. MICROPHONE
  16. 16. USES • This is used for the input of sound which is then digitised by the computer. The digital audio can be saved for playback later on. • The digital audio can also be used with voice- recognition software to control hardware, navigate a menu or input text into a word processor. Voice recognition can also be used in security systems.
  17. 17. ADVANTAGE • Voice recognition software can be used to convert your voice into text or to control menu options on a phone system.
  18. 18. DISADVANTAGES • Stored audio files can take up a lot of memory. • Voice commands can be difficult to recognise by the software.
  19. 19. THE END

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