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

1. TOPIC
INPUT AND OUTPUT DEVICES
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2. INPUT DEVICES
KEYBOARD
MOUSE
DIGITAL CAMERA
MICROPHONE
TOUCH SCREEN
OPTICAL MARK READER(OMR)
SCANNER
SMART CARDS
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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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.
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11. OUTPUT DEVICES
COMPUTER MONITOR
SPEAKERS
PRINTER
PLOTTER
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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.
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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.
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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.
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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.
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16. THANKS
By VIPUL GUPTA
BBA Sem.1st
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