The document discusses the evolution of communication technologies over time, from early visual and oral methods to modern digital technologies. It describes several ancient visual communication methods like smoke signals and homing pigeons. It then covers the development of print media with the invention of the printing press. The rise of electrical telegraph and telephone is discussed next. The advent of radio, television, and computer networks fundamentally transformed communication. Modern technologies like the internet, email, smartphones, and social networking now dominate how people connect and share information globally.

1. Communication
Then & Now
Business Communication

2. Communication
Communication is the process where
one person is expressing his or her idea
& the other one is listening to the idea
being expressed by the one who is
talking. That is how you define
communication.
When this results to have an
understanding to both of them, therefore
there is already a communication.

5. Visual Communication
Visual communication as the name
suggests is communication through
visual aid & is described as the
conveyance of ideas & information in
forms that can be read or looked upon.

6. 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 signalling from tower to tower.
 In this way, they were able to transmit a
message as far away as 750 km(470 mi)
in just a few hours.

7. Pigeon Post
 It is 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 messages, 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.

8. Mail
 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.
 Since the mid-19th century national postal systems have
generally been established as government monopolies
with a fee on the article prepaid.

9. Heliograph
 It is a wireless solar telegraph that signals by flashes
of sunlight (generally using Morse code) reflected by
a mirror. The flashes are produced by momentarily
pivoting the mirror, or by interrupting the beam with a
shutter.
 The heliograph was a simple but effective instrument for
instantaneous optical communication over long
distances during the late 19th & early 20th century.

10. Maritime flag
 It is a flag designated for use on ships, boats, & other
watercraft.
 Naval flags are considered important at sea & the rules &
regulations for the flying of flags are strictly enforced.
 The flag flown is related to the country of registration: so
much so that the word "flag” is often used symbolically
as a synonym for "country of registration".

11. Signal lamp
 It is a visual signalling device for optical communication
(typically using Morse code).
 Modern signal lamps are a focused lamp which can
produce a pulse of light. In large versions this pulse is
achieved by opening & closing shutters mounted in front
of the lamp.

12. Newspaper(Print Media)
 A newspaper is a
scheduled publication containing news of current
events, informative articles, diverse features,
editorials, & advertising
 Johannes Gutenberg's work on the printing press
began in approximately 1436.
 The invention of printing press led to an entire new
era of mass communication. Newspapers,
magazines, periodicals etc.
 This techinique of mass communication diversified
with technology & is still the most used medium of
mass communication.
 By 2007, there were 6,580 daily newspapers in the

13. Timeline Of Printing Press

15. Oral Communication
Oral communication, while primarily
referring to spoken verbal communication,
can also employ visual aids & non-
verbal elements to support the conveyance
of meaning.
Oral communication includes speeches,
presentations, discussions, & aspects of
interpersonal communication.

16. Horn & Drums
 A horn is a tapered sound guide designed to provide
an acoustic impedance match between a sound source
& free air.
 This has the effect of maximizing the efficiency with
which sound waves from the particular source are
transferred to the air. Conversely, a horn can be used at
the receiving end to optimize the transfer of sound from
the air to a receiver.

17. Electrical telegraph
 It is a telegraph that uses electrical signals, usually
conveyed via telecommunication lines or radio.
The electromagnetic telegraph is a device for human-to-
human transmission of coded text messages.
 It is the first form of electrical telecommunications.
 Later electrical telegraph networks permitted people &
commerce to almost instantly transmit messages across
both continents & oceans.

18. Telephone
 The telephone, colloquially referred to as a phone, is
a telecommunications device that transmits & receives
sounds, usually the human voice.
 They are a point-to-point communication system to allow
two people separated by large distances to talk to each
other.
 Developed in the mid-1870s by Alexander Graham Bell.
 The telephone has long been considered indispensable
to businesses, households & is now one of the most
common appliances in the developed world.

19. Photophone
 The photophone (also known as a radiophone) is
a telecommunications device which allowed for
the transmission of both articulated sounds & normal
human conversations on a beam of light.
 The device was a precursor to fibre-optic
communications that came into widespread use during
the 1980s.

20. Radio
 Radio is the transmission of signals through free space
by electromagnetic waves with frequencies significantly
below visible light, in the radio frequency range, from
about 3 kHz to 300 GHz. These waves are called radio
waves.
 Electromagnetic radiation travels by means of oscillating
electromagnetic fields that pass through the air &
the vacuum of space.

21. Advanced Electrical
Signals

22. Television
 Television: (TV) is a telecommunication medium for
transmitting & receiving moving images that can
be monochrome (black-and-white) or coloured, with or
without accompanying sound.
 Commercially available since the late 1920s, the
television set has become commonplace in homes,
businesses & institutions, particularly as a vehicle for
advertising, a source of entertainment & news.

23. Timeline Of Televisions
2012

24. Videophone
 Videophone is a telephone with a video display,
capable of simultaneous video & audio for
communication between people in real-time.
 It provided the first form of video telephony, later to
be followed by videoconferencing, webcams &
finally HD telepresence.
 Modern examples of videophones Skpye (Microsoft),
Facetime (Apple) etc.

25. Computer Network
 It is a collection of computers &
other hardware components interconnected by
communication channels that allow sharing of
resources & information.
 Networks may be classified according to a wide
variety of characteristics, such as the medium used
to transport the data, communications
protocol used, scale, topology & scope.

26. Intranet
 Intranet is a computer network that uses Internet
Protocol technology to share information,
operational systems, or computing services within
an organization.
 The term is used in contrast to internet, a network
between organizations & instead refers to a network
within an organization.
 The objective is to organise each individual's
desktop with: minimal cost, time & effort to be more
productive, cost efficient, timely, & competitive.

27. Mobile Phones
 A device that can make & receive telephone
calls over a radio link moving around a wide
geographic area.
 It does so by connecting to a cellular network
provided by a mobile phone operator, allowing
access to the public telephone network.
 The first hand-held mobile phone was demonstrated
by
Dr Martin Cooper of Motorola in 1973
 In 1983, the DynaTAC 8000x was the first to be
commercially available.
 From 1990 to 2011, worldwide mobile phone
subscriptions grew from 12.4 million to over 5.6

28. • 1st Generation of wireless telephone.
• They used Analog telecommunications standards introduced in the
1G 1980s until replaced by 2G.
• Benefits of 2G networks over their predecessors were that phone
conversations were digitally encrypted; 2G systems were
significantly more efficient and 2G introduced data services for
2G mobile, starting with SMS text messages
• It introduced Mobile TV, Video on demand, Video Conferencing,
Telemedicine, Location-based services, Global Positioning System
3G (GPS)
• 4G system provides mobile ultra-broadband Internet access.
• Conceivable applications include amended mobile web access, IP
4G telephony, gaming services, HD/3D Mobile TV & video conferencing.

29. Satphone
 Satellite telephone: satellite phone, or satphone is a
type of mobile phone that connects to
orbiting satellites instead of terrestrial cell sites. They
provide similar functionality to terrestrial mobile
telephones; voice, short messaging service & low-
bandwidth internet access are supported through most
systems.

30. Fax
 Fax is the telephonic transmission of scanned printed
material (both text & images), normally to a telephone
number connected to a printer or other output device.
 The original document is scanned with a fax machine (,
which processes the contents as a single fixed graphic
image, converting it into a bitmap, & then transmitting it
through the telephone system. The receiving fax
machine reconverts the coded image & prints a copy.

31. Internet
 The Internet is a global system of
interconnected computer networks that use the
standard Internet protocol suite to serve billions of
users worldwide.
 It is a network of networks that consists of millions
of private, public, academic, business, & government
networks, of local to global scope, that are linked by
a broad array of electronic, wireless & optical
networking technologies.
 The Internet carries an extensive range of
information resources & services, such as the inter-
linked hypertext documents of the World Wide
Web (WWW) & the infrastructure to support email.

33. E-Mail
 Electronic mail: also known as email or e-mail, is a
method of exchanging digital messages from an
author to one or more recipients.
 Modern email operates across the Internet or
other computer networks.
 Some early email systems required that the author &
the recipient both be online at the same time.
 Today's email systems are based on a store-and-
forward model.

34. Social Networking
 A social networking service is an online service,
platform, or site that focuses on facilitating the building
of social networks or social relations among people who,
e.g. share interests, activities, backgrounds or real-life
connections.
 A social network service consists of a representation of
each user (often a profile), his/her social links, & a
variety of additional services.
 Most social network services are web-based & provide
means for users to interact over the Internet, such
as email & IM.
 Example: Facebook(800 million active users), Twitter ,
Google+ etc.

35. Utkarsh Haldia(16)
Zeenia(31)