-
Computer, Charles Babbage (1822)
An electronic device for storing and processing data, typically in binary form, according to instructions given to it in a variable program. -
Telegraph, Samuel Morse (1832)
A telegraph works by transmitting electrical signals over wires. -
Telephone, Alexander Graham Bell (1876)
A telephone is a telecommunications device that permits two or more users to conduct a conversation when they are too far apart to be heard directly. -
Radio, Guillermo Marconi (1897)
Radio is the technology of signaling and communicating using radio waves. -
Television, John Logie Baird (1923)
Is a telecommunication medium for transmitting moving images and sound. -
Tablet, Alan Kay (1968)
Tablets let you do many of the same things as a traditional computer. They can browse the Internet, connect to social network apps, and display HD videos. -
Mobile phone, Martin Cooper (1984)
A telephone with access to a cellular radio system so it can be used over a wide area, without a physical connection to a network.