Its about how communication has evolved throughout the years.Technology has redefined communication.

1. Sheba M
Chaitali K
Nikhil k
Pooja S
Nawaz Ashahar
201830
201816
201846
201829
201832
HUMA
N
The Topic :

2. The Smoke Signal
• The smoke signal is one of the oldest forms of long-distance
communication.
• Great Wall of China
• Smoke signals remain in use today.

3. • Pigeons were effective as messengers due to
their natural homing abilities.
• The Romans used pigeon messengers to aid
their military over 2000 years ago
• The Greeks conveyed the names of the victors at
the Olympic Games to their various cities by this means.
Pigeon

4. • Signal lamps are a focused lamp which can produce a pulse of light.
• Signal lamps were pioneered by the Royal Navy in the late 19th century
on naval vessels
• In air traffic control towers, signal lamps are still used today,
as a backup device in case of a complete failure of an aircraft's radio.
Signal lamp

5. Mail
 The mail or post is a system for physically transporting postcards, letters,
and parcels.
 The first use of an organized courier service for the diffusion of written
documents was in Egypt.

6. NEWSPAPERS
• Still used today, often used
starting in the 1800s.
• A newspaper is a scheduled
publication of advertising,
articles.
• Johannes Gutenberg's work on the
printing press began in 1436.
• Printing press led to a entire new
era of mass communication.

7. THE TELEGRAPH
• The telegraph became popular in 1838.
• The Trans-Atlantic telegraph provided
communication between America and
Europe.
• First message was : "Europe and America
are united by telegraphy.”
• It is a device for human-to-human
transmission coded text messages.
• First form of electrical telecommunications.

8. Telephone
• Telephone is a telecommunication device that transmits and
receives sound.
• Telephone is one of the most common appliances in the
developed world.
• Two people separated by large distance can talk to each other.
• Developed by Alexander Graham Bell.

9. PHONOGRAPH
• Thomas Edison invented the
phonograph in 1877.
• Most common device for playing
recorded sound .
• Used from the late 1877 until the
late 1980.

10. • Invented around 1896AROUND 1896,
• The transmission of electromagnetic waves through free space
• Frequency range from about 3 kHz to 300 GHz called as radio waves.
• Electromagnetic radiation travels by means of oscillating electromagnetic
fields that pass through the air & the vacuum of space.
Radio

11. • THE FIRST TELEVISION (T.V.) WAS
MADE IN 1927.
• Today, televisions are widely used for
information and entertainment.
• TV is a medium for transmitting &
receiving moving images.
• Found at common place in homes,
business & institutions,
• A Vector for advertising a source of
entertainment & news.
Television

12. Computer Network
• computer hardware interconnected by channels that allow
sharing of information.
• It is the medium used to transport the data, communication
protocol used, scale, & scope.
• The first wide area network (WAN) came in 1965
• ARPANET was used to connect four universities in 1969.

13. Mobile Phones
• It make & receive calls over a radio link moving around a wide
geographic area.
• It connect a cellular network provided by a mobile phone operator,
allowing access to the public telephone network.
• First demonstrated by Dr. Martin Cooper of Motorola in 1983.
• The DynaTAC 8000x was the first to be commercially available.
• Our smartphones today are leaps and bounds above the capabilities
and technology of original cell phones.

14. Internet
 It is a network of netwoks.
 Vast range
 Internet security

15. OPTICAL FIBERS
Introduces
Flexible fiber
Drawing glass (Silica) or plastic

16. • Exchanging message.
• Roy Tomlinson.
• Available in1981.
Electric Mail
• Modern email operates
across the internet or other
computer networks.
• Today’s email systems are
store- and-forward.

17. Social Networking
• Social networking service
• Focuses on facilitating
• Way to communicate

18. Conclusion
.
• The communication revolution has brought around many
positive effects.
• It helps to make important decisions without having to travels
hundreds of miles or meet face to face.
• It breaks down social and worldwide barriers, allowing people
interact across the globe, different races, cultures, backgrounds
and statuses interact.