Communications A look back Background Communications is the act of - - PowerPoint PPT Presentation

▶
communications
SMART_READER_LITE
LIVE PREVIEW

Communications A look back Background Communications is the act of - - PowerPoint PPT Presentation

Mar 19, 2024 44 likes •267 views

Communications A look back Background Communications is the act of conveying information using exchange of thoughts, messages or information, using speech, visuals, signals, writing or behavior. This presentation traces communications

slide-1
SLIDE 1

Communications

A look back

slide-2
SLIDE 2

Background

  • Communications is the act of conveying

information using exchange of thoughts, messages or information, using speech, visuals, signals, writing or behavior.

  • This presentation traces communications

from the past to about 2000. Our class will take it from there.

slide-3
SLIDE 3

Cave paintings

  • Prior to about 3500 BC
slide-4
SLIDE 4

Hieroglyphic writing

  • Around 3500 BC
  • Egyptians and Sumerians
slide-5
SLIDE 5

On foot

  • 490 BC, Phidippides ran from Marathon to Athens to

warm the Athenians of the approaching Persian army. Apparently, he died from the strain.

  • Foot would remain important for communication, using

horses during Roman times (14AD), Kublai Khan times (1280 AD) and our Pony Express (1861 AD)

slide-6
SLIDE 6

Metal mirrors & the Sun

  • Around 26-37 AD, Roman Emperor

Tiberius rules empire by signaling with polished metal to reflect the sun.

slide-7
SLIDE 7

Paper!

  • In 751, Paper is introduced, using wood

pulp.

  • In 1844, Charles Fenerty produces paper

from wood pulp.

slide-8
SLIDE 8

Printing

  • 1305 Chinese develop wooden block

movable type printing

  • 1450 Johannes Gutenberg creates metal

moveable type printing press

slide-9
SLIDE 9

Telegraph from tower to electric

  • 1792 Claude Chappe establishes first long distance

semaphore telegraph line (uses towers to send visual signals)

  • 1831 Joseph Henry builds electric telegraph
slide-10
SLIDE 10

Morse code and long distance

  • 1835 Samuel Morse develops Morse Code
  • 1843 Morse builds long distance electric

telegraph

slide-11
SLIDE 11

Electric telephone

  • 1876 Alexander Graham Bell and Thomas

Watson create electric telephone line

slide-12
SLIDE 12

Phonograph

  • 1877 Thomas Edison patents phonograph
slide-13
SLIDE 13

Radio signals for communication

  • 1901 Guglielmo Marconi transmits radio

signals

slide-14
SLIDE 14

First television signal

  • 1925 John Logie Baird transmits first

television signal. During World War 2, he developed the first color picture tube.

slide-15
SLIDE 15

Beginning of cell phone technology

  • 1947 Douglas H. Ring and W. Rae Young
  • f Bell Labs proposed a cell based approach

to technology which would lead to cell phones.

slide-16
SLIDE 16

First copying machine

  • 1958 Chester Carlson presents first

photocopier suitable for office use

slide-17
SLIDE 17

Internet ancestors

  • 1969 First hosts of ARPANET (Internet

ancestors) are connected

slide-18
SLIDE 18

WWW (World Wide Web)

  • 1989 Tim Berners-Lee and Robert Cailiau

build prototype for World Wide Web at CERN

slide-19
SLIDE 19

First Text Message

  • 1992 Neil Papworth sends first SMS (or text

message)

slide-20
SLIDE 20

Digital Satellite

  • 2001 first digital cinema transmission by

satellite

slide-21
SLIDE 21

Communication Technology today:

  • Websites
  • Blogs
  • Email
  • Discussion groups
  • Chat
  • Instant messaging
  • SMS (Text messaging)
  • Social networks
  • Tweeting
  • Video conferencing
  • Voice messaging
slide-22
SLIDE 22

Discussion questions

  • Which type of communication mentioned

do you feel is the most important for personal use? Business use?

  • What are some of the advantages of the

increasing types of communication available?

  • What are some disadvantages of these
  • ptions?