The document discusses various forms of communication throughout history including smoke signals, pigeons, signal lamps, mail delivery, newspapers, the telegraph, telephone, phonograph, radio, television, computer networks, mobile phones, the internet, optical fibers, email, and social networking. It concludes that the communication revolution has brought many positive effects such as facilitating important decisions without long travel and breaking down social barriers by allowing global interaction.

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.