INPUT
DEVICES
l
Input is any data and instructions entered into the memory of a Computer
Pointing Devices
A pointer is a small symbol on the screen whose location
and shape change as a users moves a pointing devices
l A mouse is a
pointing device that fits under the palm of your hand comfortably
l Optical mouse, laser
mouse, and touch mouse
|
Touchpad
A touchpad is a
small,
flat, rectangular
pointing
device that is
sensitive
to pressure and
motion
|
Pointing
stick
A
pointing stick is a pressure-sensitive pointing device shaped like a pencil
eraser that is positioned between keys on a mobile computer keyboard
|
Trackball
A
trackball is a stationary pointing device with a ball on its top or side
|
Keyboards
Most desktop computer
keyboards have:
l Typing
area
l Function
keys
l Toggle
key
l Directional
keys
l Media
control buttons
l Internet
control buttons
There
are various types of keyboards in addition to standard keyboards found on
desktops
·
An ergonomic keyboard has a design that reduces the
chance of repetitive strain injuries
·
Ergonomics incorporates comfort, efficiency, and safety
into the design of the workplace
OUTPUT DEVICES
·
Output is data that has been processed into a useful
form.
Printers
·
A printer produces text and graphics on a physical medium
·
Type of printers :
-
Ink-jet printers
-
Photo printers
-
Laser printers
-
All-in-one printers
-
Thermal printers
-
Mobile printers
-
Plotters
-
Large-format printers
Ink-jet
Printers
• forms characters and graphics
by spraying tiny drops of liquid ink onto a piece of paper
•
Color or
black-and-white
•
Speed is measured
by the number of pages per minute (ppm) it can print
Photo
Printers
•
Produces lab-quality pictures
•
Many use ink-jet technology
•
Pictbridge allows you to print photos directly from a
digital camera.
•
Print from a memory card.
Laser
Printer
•
High speed
•
Produces high quality printed photos
•
Able to print either colour or in black and white
Thermal
Printers
•
generates images by pushing electrically heated pins
.against the heat-sensitive paper
Plotters
• used to produce
high-quality drawings
• Large-format printers
create photo-realistic quality color prints
Mobile
printer
·
a small, lightweight,
battery-powered printer that allows a mobile user to print from a mobile device
Label
Printers
·
a small
printer that prints on an adhesive-type material that can be placed on a
variety of items
Impact
printers
·
form characters and graphics on
a piece of paper by striking a mechanism against an inked ribbon that
physically contacts the paper
Data
Projector
·
a device that takes the text and images displaying on a
computer or mobile device screen and projects them on a larger screen.
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