The document provides a history of communication technologies from early methods like speech and symbols to modern devices. It covers symbolic communication through cave paintings and petroglyphs, the development of writing systems in Egypt and China, and distance communication methods such as smoke signals. Key inventions discussed include the printing press, telegraph, telephone, radio, television, and early computers developed by pioneers like Konrad Zuse. The technologies discussed enabled new forms of communication over increasing distances through history.
5. SPEECH
Singing
Telling Story
Example:
Minstrels & Harp
Oral history handed down
from one generation of
story-tellers to another.
6. SYMBOLIC COMMUNICATION
Cave Painting:
Oldest know form of human
art work
Pre-historic paintings on
cave walls and ceilings
Interpreted as being hunting
magic, meant to increase the
number of animals
Cave drawing at Lascaux in France, 15,000
BC. It shows the scenario of people’s life in
that time.
7. SYMBOLIC COMMUNICATION
Petroglyph:
Creation of pictures on
rocks by picking, incising
and carving
The oldest petroglyph is
between 10,000 to
12,000 years old
Interpreted as early
forms of pre-writing
21. PRINTING PRESS
The earliest dated printing
book is the “Diamond Sutra”
It was printed in China in 868
CE
Printed using wood blocks
made from Mulberry Wood
22. PRINTING PRESS
First movable type printing press invented in 1450
By a German craftsman named Johannes
Gutenberg
It was developed from the technology of screw-type
wine press
23. PRINTING PRESS
Gutenberg was the first to use
press to print the Bible
He brought down the price of
printing materials
By the end of the 15th century it
had spread to over 236 cities
First Bible printed by Johannes
Gutenberg
24. PRINTING PRESS
Gutenberg printing press remained the standard
until the 20th century
Two ideas altered the design of the printing press
radically:
First, the use of steam power for running the machinery
Second, the replacement of the printing flatbed with the
rotary motion of cylinders
28. SMOKE SIGNALS
Used by the Chinese
Military on The Great
Wall
As an intruder alert
Single smoke signal =
100 enemies
Two smoke signal = 500
enemies
Three smoke signal =
1000 or more
31. FLAG SIGNALS
The telegraph used a semaphore system
Alphabetic signaling
Receiver had to have full view of flag
To interpret message being sent
34. DRUM SIGNALS
Used by Nigerian Tribes to communicate
For rituals, storytelling and celebrations
35. AUDIO SIGNALS
Talking Drums
Speaks in the language
of the tribe
Talking Drum were
also used as an alarm
To warn slaves when
the slave master was
approaching
38. ELECTRIC TELEGRAPH
First invention of the
electric telegraph in
1831
By Joseph Henry
Possibility of using
electromagnets to
communicate
Wasn’t good enough
39. MORSE TELEGRAPH
In 1835 Samuel Morse improves Henry’s telegraph
Telegraph used pulse instead of a bell
The Morse Telegraph
40. THE TELEGRAPH
Prints dots and dashes
on paper
Representing alphabets
and numbers from 0-9
Creating long and short
pulses
Encoded by sender,
decoded by receiver
41. MORSE TELEGRAPH
First message sent by Morse Telegraph, 1844
In Morse code
“.-- …. .- - …. .- - …. --. --- -.. .-- .-. --- ..- --. - ….”
“What hath God wrought?”
44. TELEPHONE
An improvement of the telegraph
Telegraph limited
Communication was not simultaneous
Inventors thought why not make a new telegraph
45. TELEPHONE
Alexander Bell knew how
sound was transmitted
Possibility of multiple
messages sent at the
same time
Harmonic telegraph
46. TELEPHONE
Bell had another great idea
Create a device that could transmit speech
Simultaneously
48. TELEPHONE
Tele means at a distance
Phone means sound
Hence, the name Telephone
First message send over the telephone
“Mr. Watson, come here. I want to see you.”
The Telephone one of the greatest inventions
49. DID YOU KNOW?
Alexander Bell was not the only inventor of the
telephone.
Elisha Gray invented the telephone the same time
Alexander did
Alexander was the first to patent his invention
51. OVERVIEW
Developed from two inventions
the telegraph and the telephone
An apparatus for receiving or transmitting radio
broadcasts
There are varying disputed claims about who
invented radio
At the beginning was called "wireless telegraphy".
52. RADIO WAVES
A type of electromagnetic radiation
Wavelengths in the electromagnetic spectrum
longer than infrared light.
They travel at the speed of light.
The capacity to transmit music, speech, pictures
and other data invisibly through the air.
53. RADIO HISTORY
In 1887, Heinrich Hertz
demonstrated Maxwell’s
electromagnetic waves
First predicted by mathematical
work done in 1865 by James Clerk
Maxwell
54. WIRELESS TELEGRAPHY
First Wireless Transmission
1901, Italian inventor Guglielmo
Marconi
oThe first voice transmission
ooccurred on December 24th, 1906
oThe transmission included reading
from the Bible, playing the violin, and a
phonograph recording of "Largo."
Canadian engineer
Reginald Fessenden
55. RADIO AS COMMUNICATION
a reliable and versatile way to communicate with
the rest of the world.
Broadcast consists of local / world news, music,
verbal shows, and etc.
Radio is free for everyone
As long as there is a signal
57. OVERVIEW
The history of television records the work of
numerous engineers and inventors in several
countries over many decades.
The fundamental principles of television were
initially explored using electromechanical methods
to scan, transmit and reproduce an image.
58. MECHANICAL TELEVISION
Paul Nipkow developed a
rotating-disc technology in
1884
Transmits pictures over
wire called the Nipkow
disk
Discovered the
television's scanning
principle
light intensities of small
portions of an image are
successively analyzed and
transmitted
59. MECHANICAL (CONT)
Charles Jenkins invented
a mechanical television
system called radiovision
Claimed to have
transmitted the earliest
moving silhouette images
on June 14, 1923.
60. CATHODE RAY TUBE
Electronic television is
based on the development
of the cathode ray tube
which is the picture tube
found in modern TV sets.
German scientist, Karl Braun invented
the cathode ray tube oscilloscope (CRT)
in 1897.
61. TELEVISION AS COMMUNICATION
Reaches a large audience
Diversified to fit many different audiences
Carries many channels and networks which can
allow the viewer a choice
Efficient and can quickly spread information
a very effective tool in spreading information and
entertainment to a large and diversified audience.
63. INVENTIONS OF KONRAD ZUSE
FIRST INVENTION OF Z SERIES: Z1
In1936, Zuse made a mechanical calculator called the Z1
The first binary computer.
used it to explore several ground-breaking technologies in
calculator development
floating-point arithmetic, high-capacity memory and
modules or relays operating on the yes/no principle.
64. 2ND INVENTION OF Z SERIES: Z2
In 1939, Konrad Zuse completed the Z2, the first
fully functioning electro-mechanical computer.
65. 3RD INVENTION OF Z SERIES: Z3
His 3rd invention Z3
constructed with recycled materials
It was the world's first electronic
fully programmable digital computer
based on a binary floating-point number and
switching system
Old movie films were used to store data and
programs
66. THE LAST INVENTION OF THE Z SERIES
Z4 was completed and in 1955.
It had a mechanical memory with a capacity of
1,024 words.
The Z4 had punches and various facilities to enable
flexible programming
including address translation and conditional branching.
67. FIRST ‘MODERN’ ELECTRIC COMPUTER
The Atanasoff-Berry Computer (ABC) first to
use modern digital switching techniques
Vacuum tubes as switches
Introduced the concepts of binary arithmetic and
logic circuits