TIMELINE OF MILESTONES IIN HUMAN AND ELECTRONIC COMMUNICATION Flashcards
1830
Professor Joseph Henry transmitted the first practical electrical
signal.
Professor Joseph Henry transmitted the first practical electrical
signal.
1830
1837
Samuel Morse invented the telegraph.
Samuel Morse invented the telegraph.
1837
1876
Alexander Graham Bell and Thomas A. Watson invented the
telephone.
Alexander Graham Bell and Thomas A. Watson invented the
telephone.
1876
1887
Heinrich Hertz discovered radio waves.
Heinrich Hertz discovered radio waves.
1887
1887
Guglielmo Marconi demonstrated wireless radio wave
propagation.
Guglielmo Marconi demonstrated wireless radio wave
propagation.
1887
1901
Guglielmo Marconi accomplished the first transatlantic
transmission of radio signals
Guglielmo Marconi accomplished the first transatlantic
transmission of radio signals
1901
1903
John Fleming invented the two-electrode vacuum-tube rectifier
John Fleming invented the two-electrode vacuum-tube rectifier
1903
1906
Lee De Forest invented the triode vacuum tube.
Lee De Forest invented the triode vacuum tube.
1906
1923
Vladimir Zworykin invented and demonstrated television.
Vladimir Zworykin invented and demonstrated television.
1923
1948
William Shockley, Walter Brattain and John Bardeen invented the
transistor.
William Shockley, Walter Brattain and John Bardeen invented the
transistor.
1948
1959
The integrated circuit was invented.
The integrated circuit was invented.
1959
1965
The first commercial communications satellite was launched
1983
The cellular telephone network was first introduced in the United
States.
The cellular telephone network was first introduced in the United
States.
1983
