• Communication Skills
Information Process Structure
Anything that is given to computer to
process and convert into information is
e.g text, speech, video and digital
Introduction to computer input devices
A device that can be used to insert data
into a computer or other computational
Any hardware device that sends data to
the computer, without any input devices,
a computer would only be a display
device and not allow users to interact
Computer works with the commands an
the input given by the user
Types of input devices:
There are two types of input devices:
1. Manual Input:
2. Automatic Input:
MICR (Magnetic Ink Character
OMR (Optical Mark Recognition)
OCR (Optical Character
Used to input text data into the
They are very common; all computers
have one and they are easy to use.
Easy to make mistakes if you can’t type
Enables you to control the movement
of the on screen curser by moving it
around a surface
Easy to learn to use
Accurate for selecting things
Need a flat space next to the computer.
Like an upside down mouse, you
turn it with your hand to move the
pointer on the screen
Ideal for using when flat space next
to computer is limited
Not very easy to use.
• Similar to a tracker ball in operation
except you have a stick which is
moved rather than a rolling ball.
Faster than mouse and performs
immediate action .
Some people find them more difficult
to use than mice.
Used to input sound
Some systems can understand most
peoples voices with voice recognition
Some systems need to be trained to
understand each different voice.
Looks very similar to a traditional
camera. However, unlike
photographic cameras, digital
cameras do not use film
No film needed.
Images can be digitally manipulated
Need to print out photographs
Another way in which we can capture
still images or text to be stored and
used on a computer.
Can input things from paper
With OCR software, text can be
Images can take up a lot of memory
Stands for Magnetic Ink Character
Recognition. Banks use them; the
reader reads the numbers on a
Read at 100% accuracy..
The reader and ink is expensive
Stands for Optical Mark Reader.
Reads pencil marks on a specially
designed form or document, e.g. on a
Fast and accurate way of inputting
Only works if the marks have been
made accurately and clearly.
A bar code reader uses a visible red
light to scan and read the barcode.
Any price change only needs to be
changed on the computer system,
not on each item.
Does not reads if surface is reflective
due to humidity or if oily.