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Keyboard
A keyboard is probably the mostly used input device which can be either
wired or wireless. It is used to accept textual data from the user. It is
impossible to imagine a computer without one. A typical keyboard has a
typing area that includes the letters of the alphabet, numbers, punctuation
marks, and other basic keys similar to that of a type writer. Keyboard
Mouse
A mouse is another input device which is also known as a Pointing Device. As you move the
mouse, the pointer on the screen moves. A typical mouse has two buttons and a wheel. It can
be either wired or wireless.
Mouse
Scanner
A scanner is a device used to read the hand written notes, images, photos, and transfer
it in a digital form onto the computer where it can later be saved or manipulated as per
the requirement.
Scanner
Light Pen
A light pen is a pointing device shaped like a pen and is connected to a VDU. The tip of the light
pen contains a light-sensitive element which, when placed against the screen, detects the light
from the screen enabling the computer to identify the location of the pen on the screen. We
Light Pen
generally use it to make a selection or draw anything on a screen.
Touchscreen
Touchscreen is the latest in the input devices where the input can be taken from the
user through a touch of a finger, stylus, or a light pen on a display screen. We can give
the entire set of commands by touching. Nowadays most of the laptops, Smart TV,
smartphones, tablets, etc. also have touch screens where the use of the keyboard is
minimised. It is a very useful and convenient alternative to a mouse or a keyboard in
a graphical user interface. Touchscreen
Microphone
Microphone is a device that converts the sound received into a digital audio form which can be
easily stored or manipulated in a computer.
Microphone
Barcode Reader
A bar code is a set of parallel lines that appear on the products as their identification.
You will find most of the packages having these barcodes that can be easily read by
barcode readers. Bar code readers work by placing a beam of light on the lines that
make up the bar code and detecting the amount of light that is reflected back. The
barcode read is then stored in the computer for preparing invoices. Barcode Reader
MICR
The bank account number and other details are printed onto bank cheques which are read
by Magnetic Ink Character Recognition using a special magnetic ink. They are useful to
find out whether the cheque is genuine or fake.
MICR
ICT Skills-I 81

