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Information and Communication Technology Applications

Notes
Name some of the output devices used with computer systems. Explain their
applications.

5.2 Emerging Input/Output Devices

Recently major advances have been made recently in input and output technology. The emerging
input devices are :
1. Portable Screen. On this screen, you will be able to write and may become a reliable choice for
input.
2. Voice Keyboard. You would be able to make your keyboard speakable using a software. The
keyboard will speak your documents when you will type them. So, it will help you to avoid typing
errors.
3. Speech Recognition Devices/Software. These devices/software will recognise your speech and
convert voice-data into digital form. Although these software are still available, they are not very
reliable.
4. Language Translator Devices/Software. Scientists are trying to develop such devices/software,
which would translate input given in are language into another.
5. Handwriting Recognition Devices/Software. These devices/software would recognise your
handwriting precisely and store the text in the computer.
The emerging output devices are described below:
1. High Resolution LCD Monitor. Scientists are trying to develop new kinds of liquid crystals that
will provide high resolution LCD (Liquid Crystal Display) monitor.
2. Flat-panel Monitor. These monitors could be mounted on walls and would have extremely high
resolution. The whole wall of your room could become a monitor.
3. Retinal Monitor. These monitors would focus the output directly on to the retina of eye. This
technology called Virtual Retinal Display (VRD) is still under Research and Development.

5.3 Role of Input and Output Devices

You know, CPU (Central Processing Unit) is the main part of all types of computers. It can not
function without input and output devices. Therefore, input and output devices are the peripherals
or peripheral devices of a computer. Although the detailed function of various input and output
devices have been explained in the unit, we are summarising them in Table 5.2.

Table 5.2: Function of Various Input and Output Devices of a PC
Name of Device Input/Output Function

Keyboard Input Device Standard device of every PC, used to enter data and to
give commands.
Mouse Input Device Pointing devices used to move cursor, draw diagrams,
select menu items, etc. while working on Windows.
Microphone Input Device Voice-input device used to record sound.
Scanner Input Device Used to scan document and photograph by converting
them into electronic images.

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