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1729 Discovery that electricity can be transmitted Stephan Gray
1746 Electrometer measuring device invented Gralath
1831 Electromechanical generator invented Michael Faraday
1844 Telegraph and Morse Code developed Samuel Morse
1847 Boolean algebra developed George Boole
1858 Transatlantic cable laid Cyrus Field
1876 Bell telephone system established  
1895 Photographic film developed Eastman
1897 Ship-to-shore wireless transmission demonstrated Marconi
1900 Speech transmitted by wireless method  
1901 Transatlantic wireless message
Spark-gap transmitter
1906 Crystal radio detector invented  
1915 Transatlantic radio telegraphy message from the United States  
1917 Electric wave filter Campbell
1920 Commercial radio broadcast (KDKA, Pittsburgh, PA)
Superheterodyne circuit developed

1923 Iconoscope television camera tube invented Zworykin
1929 Kinescope (TV picture tube) invented Zworykin
1930 radar system demonstrated Blair
1931 Oscilloscope invented Allen DuMont
1934 Telecommunications Act of 1934  
1937 Klystron tube developed  
1939 Television broadcast by NBC  
1941 FM broadcasting begins in United States  
1942 Magnetic recording tape invented
ENIAC electronic computer
1948 Transistor developed at Bell Labs  
1951 UNIVAC 1 computer introduced  
1953 Early laser demonstrated Zeigler
1955 Varactor diode developed  
1956 Electronic movie camera (Bell and Howell)  
1957 Sputnik satellite launched (Russian)  
1958 Integrated circuit developed
Stereo broadcasting
1962 Light-emitting diode (LED) introduced
Telstar communication satellite
1963 Commercial mini-computer  
1966 Magnetic bubble memory developed Andrew Bobeck
1970 Arpanet introduced (early version of Internet) VP Algore
1971 Microprocessor developed
Hand-held calculator introduced
1975 Home video tape recorder introduced  
1977 Fiber optic communications for regular telephone service  
1996 Telecommunications Act of 1996 established