History Quiz / Important 20th century innovations at Bell Laboratories

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Name some of the transformative technologies that emerged from Bell Laboratories during the 20th century.

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Foundation of solid state electronics and computer age
Device that converts photons into digital values; important uses in digital imaging
First calls were made in St. Louis in 1946
First practical units were produced at Bell Labs; converts light energy into electrical power
Allowed live overseas television images beginning in 1962
Device producing coherent beams of light or other radiation
Introduced in 1963; major improvement over existing pulse dial systems
Operating system for mainframe computers
General purpose computer programming language
Provided 36 channels (initially) of voice communication internationally
Discovery by Karl Jansky of Bell Labs in 1932 of radiation emanating from the Milky Way
Concepts developed by Claude Shannon about limits on signal processing and communications
Single chip processor introduced in 1979; separated signal from background noise
Allowed secure conversations between Churchill and Roosevelt during WWII

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