This document discusses various modes of communication including mail, files, telex, telegraph, telephones, and computers. It provides details on each mode, describing their evolution, components, advantages, and disadvantages. Mail involves collecting, sorting, and delivering letters and packages. Filing systems allow storing hard copies of documents for easy access later. Telex uses teletypewriters connected to a phone network to send text messages. Telegraph transmits information through electrical pulses along wires. Telephones provide fast communication across distances with immediate feedback. Computers have evolved through generations from vacuum tubes to microchips and now aim to develop artificial intelligence. The conclusion states that different modes have different strengths and weaknesses, so using multiple modes together is best.

1. Media And Modes Of
Communication.

2. Introduction.
• The English word ‘Communication’ is derived
from the Latin term ‘Communis’ .
• When a message is sent out it becomes
communication only when it is understood ,
acknowledged , reacted to or replied to by the
receiving party .

3. Modes Of Communication
1) Mail.
2) Files.
3) Telex.
4) Telegraph.
5) Telephones.
6) Computer.

4. Mail
• The mail or post is a system for physically
transporting documents and other small
packages.
• Today most countries in the world have a highly
advanced postal service .
• A basic Postal system has three parts :
a) Collecting Letters .
b) Sorting them according to destination.
c) Delivery .

5. Types Of Mail .
• There are two types of Mail .
a) Inward Mail :
• No unauthorised person is allowed to handle
the mail.
• Letters , parcels , covers , etc should be opened
in the presence of an official .
• If any letter is unanswered after the lapse of 48
hours , such letters are entered into Pending
Letter Register .

6. b) Outward Mail .
• All correspondence should be type written
and carbon copies are kept .
• The mail supplied by the business house to
other establishment is called an outward mail.

7. Files.
Even though most companies carry on their
correspondence with the help of computers , it
is very essential to keep a hard copy.
A good filing system system enables you to lay
your hands on important letters and information
quickly .

8. Advantages.
1. Traditional Filing has an security advantage over the
electronic filing .
2. It is less complex than electronic system , which
makes it easier for an untrained person to access
data .
3. It is cheaper than electronic filing .

9. Disadvantages.
1. It is hard to keep the back up of huge pile of
data.
2. It takes time to access data even when
arranged in order .
3. Editing data is difficult .
4. It can be out of order if someone puts a
wrong file in between.
5. It requires a lot of space .

10. Telex.
• It is a communication system consisting of
teletypewriter connected to a telephonic
network to send and receive signals .
• The telex network is a switched network
of teleprinters similar to a telephone network,
for the purposes of sending text-based
messages .

11. Advantages
1. Written communication can be sent from one
subscriber to another by direct dailling .
2. If the receiver is unavailable , the message is
saved in the teleprinter machine and he can
reply to it later.
3. It is quicker means of communication than the
telegram and cheaper than the trunk call
service .

12. Disadvantages.
1. The message maybe distorted .
2. Lines are frequently out of order .
3. Connection is not always available .

13. Telegraph
• A telegraph is a communications system in
which information is transmitted over a wire
through a series of electrical current pulses,
usually in the form of Morse code . The basic
components include a source of direct
current, a length of wire or cable, and a
current-indicating device such as a relay,
buzzer, or light bulb. The term comes from the
Greek words "tele" meaning "at a distance"
and "graphien" meaning "to write”.

14. Advantages.
1. The transfer of message is very fast .
2. The transfer of message between the sender
and the receiver is direct.
3. There is no distortion of message .

15. Disadvantages.
1. Skilled people are needed for the
preparation of message transmission and
reception .
2. A relatively large equipment investment and
inventory is required to achieve
teletypewriter communication.

16. Telephones.
• The telephone is one of the most marvellous
inventions of the communications era.
• Physical distance is conquered instantly and
any telephone in the world can be reached
through a vast communication network that
spans oceans and continents.
• The first successful telephone was invented by
Alexander Graham Bell on March 7 , 1876.

17. Evolution.

18. Advantages.
1. Fastest mode of communication .
2. Anyone can use it , its cheap and very handy .
3. Can communicate with more than 1 person
at a time.
4. No distance and time barrier .
5. Immediate feedback .
6. Call can be done anyday/anytime .

19. Disadvantages.
1. It is not very secure.
2. Signal might not be available everywhere .
3. There might be noise or poor quality of voice
4. There is no permanent record for legal purpose.
5. Helps terrorism .
6. These days marketing calls are being a head
ache and causes disturbance .
7. Misused for making anonymous calls.

20. Computers.
• Computers are machines that perform tasks
or calculations according to a set of
instructions or programs .
• it is an apparatus to store , classify , arrange ,
generate change or retrieve information.
• The first computer was invented by Charles
Babbage in year 1822 .

21. Evolution Of Computer .
1) First Generation (1940-1956) – Vacuum
tubes.
• The 1st generation computers relied on
machine language.
• Input was based on punched cards and paper
tape . Output was displayed on printout .
• The UNIVAC and ENAIC are the example of 1st
generation computer.

22. 2) Second Generation (1956-1963)- Transistors.
• The transistor helped computer to become
smaller , faster , cheaper , energy efficient and
more reliable than 1st gen computers.
• The second gen computers was based on
symbolic or assembly language , which
allowed programmers to specify instructions
in words.
• IBM 7000 , NCR 304 , ATLAS and Mark 3 are
the examples of 2nd gen computers.

23. 3) Third Generation (1964-1971)- Integrated
circuits.
• Transistors were miniaturized and placed
on silicon chips called semiconductor which
drastically increased the speed and efficiency
of computers.
• Keyboard was used as input device and
monitor as output device .
• It was based on OS which allowed device to
run many different application at one time .
• Examples :- PDP-8 , ICL 2900 , IBM 370 .

24. 4) Fourth Generation (1971-present)-
Microprocessors.
• Thousands of integrated circuits were built
onto a single silicon chip.
• Many high-level languages were developed in
the fourth generation such as COBOL ,
FORTRAN, BASIC , PASCAL and C language .
• Networking between the systems was
developed.
• The 1st Chip intel 4004 was developed in 1971.
• Examples:- IBM 4341 , Apple 2 , Star 1000.

25. 5) Fifth Generation (present and beyond )
Artificial Intelligence .
• These computers are based on artificial
intelligence and still on development .
• The use of parallel processing and
superconductors is helping to make artificial
intelligence a reality .
• More than one CPU for greater processing
speed .
• The goal of fifth-generation computing is to
develop devices that respond to Natural
language input and are capable of learning
and self-organization.

27. Conclusion.
We have discussed the different modes of
communication and about its advantage and
disadvantages , now which mode should we use ?
The answer is ALL .
Every mode of communication has it own
advantage and disadvantage we cannot rely on
just one mode of communication .