Input and output devices allow users to interact with computers. Common input devices include keyboards, mice, digital cameras, microphones, touch screens, optical mark readers, scanners, and smart cards. Keyboards are used to enter text, mice are pointing devices, and digital cameras capture photos or videos. Microphones record sound, touch screens accept input via finger touch, and scanners convert printed documents into digital files. Output devices such as computer monitors, speakers, printers, and plotters allow users to see and hear computer output or create hard copies. Monitors display visual output, speakers produce audio, printers create paper copies, and plotters generate large-scale drawings.

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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