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Telegraph
The first commercial system, and the most widely used needle telegraph, was the Cooke and Wheatstone telegraph, invented in 1837. -
Computer
English mathematician and inventor Charles Babbage is credited with having conceived the first automatic digital computer. -
Telephone
Was the culmination of work done by many individuals, and led to an array of lawsuits relating to the patent claims of several individuals and numerous companies. -
Radio
The invention of radio communication spanned many decades of establishing theoretical underpinnings. -
Television
Electronic television was first successfully demonstrated in San Francisco on Sept. 7, 1927. -
Tablet
Jeff Hawkins, the founder of Palm Computing, created the GridPad. Some call this the first tablet computer. -
Mobile phone
Martin Cooper
The first handheld cellular mobile phone was demonstrated by John F. Mitchell and Martin Cooper of Motorola.