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1. EVOLUTION OF
COMMUNICATION

2. What is communication?

» Exchange of information by
speaking, writing, or using
some other medium.

Encoding

Channel

Decoding

3. Ancient times ( Short Distane )

As we all know we cannot talk without a language.

4. The Smoke Signal

It is one of the oldest forms of long distance
communication, It is a form of visual
communication used over long distance. In
Ancient China, soldiers stationed along the
great wall would alert each other of impending
enemy attack by signaling from tower to tower.
In this way, they were able to transmit a
message as far away as 750km (470miles) in
just a few hours,

5. Pigeon Post

Itis the use of homing pigeons to carry
messages. Pigeons were effective as
messengers due to their natural
homing abilities. The Pigeons were
transported to a destination in cages,
where they would be attached with the
messages, and then naturally the
pigeon would fly back to its home
where the owner could read his mail.
Pigeons have been used to great
effect in military situations.

6. Mailing System

» Mail or post is a system for transporting letters & other
tangible objects: written documents typically enclosed in
envelopes & also small packages are delivered to
destinations around the world.

» Anything sent through the postal system is called mail or

post. A postal service can be private or public, though many
governments place restrictions on private systems.

7. Relay System Messenger or
receive and pass on Rajdoot

8. Medieval times

The oldest direct hand
sheets circulated widely in Venice as early as
1566. These weekly news sheets were full of
information on wars and politics in Italy and
Europe. The first printed newspapers were
published weekly in Germany from 1605.

Title page of Carolus’ / tion from

1609

9. Modern Ways ( The industrial Revolution)

» The Industrial Revolution (was a period of global
transition of human economy towards more efficient
and stable manufacturing processes using high tech
machines.

» This occurred during the period from around
1760 from Britain.

10. The First thing we got was!

» After the English government relaxed
censorship in 1695, newspapers flourished
in London and a few other cities including
Boston and Philadelphia. By the 1830s,
high-speed presses could print thousands
of papers cheaply, allowing low daily costs.

11. Telegraph

codes, known to the
recipient, rather than a

object bearing the message.

12. Process of Telegraphy

Sender Receiver Decoder

13. Telephone

In 1876, Alexander Graham Bell was
the first to be granted a United

States patent for a device that produced
clearly intelligible replication of the
human voice at a second device.“ This
instrument was further developed by
many others, and became rapidly
indispensable in business, government,
and in households.

14. Radio

» 1894, the young Italian inventor Guglielmo
Marconi began working on the idea of
building long-distance a wireless
transmission systems based on the use of
Hertzian waves (radio waves),

» A regular transatlantic radio-telegraph
service was finally begun by him on 17
October 1907.

15. » John Logie Baird is the person who is
given credit for inventing the television
for the very first time. He experimented in
an attic room in London for years until he
succeeded in transmitting an old, moving,
grayscale image of a talking ventriloquist
dummy on a screen in 1925. He called it
‘the Televisor'

16. EVOLUTION OF TELEWISION

| 5

17. Computing Technology

» British mathematician Charles
Babbage came up with the idea
for an automatic computer,
powered by steam, in 1837. He
finished designing his invention
in 1856, more than 100 years
before the first electronic ones.

18. Mainframe

Workstation

o -
Laptop
> a
= 10
E mm-scale
E 10° sensors
É :
= 10 Mini- 3 =
= Computer | —
a Personal
10 Computer
40° Smart Phone

1960 1970 1980 1990 2000 2010 2020
Year

19. Internet

>In 1990, Tim Berners-Lee
invented the World Wide
Web, or WWW, which is
what most people
recognize as the Internet
today.

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