* Electric motor (1821): The electric motor is a device that converts electrical energy into mechanical energy. It was invented by British scientist Michael Faraday in 1821.
* Electric generator (1832): The electric generator is a device that converts mechanical energy into electrical energy. It was invented by French scientist Hippolyte Pixii in 1832.
* Electric telegraph (1837): The electric telegraph is a device that transmits electrical signals over a wire. It was invented by American inventor Samuel Morse in 1837.
* Telephone (1876): The telephone is a device that transmits sound over a wire. It was invented by Scottish-born American inventor Alexander Graham Bell in 1876.
* Light bulb (1879): The light bulb is a device that produces light from electricity. It was invented by American inventor Thomas Edison in 1879.
* Radio (1895): The radio is a device that transmits and receives electromagnetic waves. It was invented by Italian-born American inventor Guglielmo Marconi in 1895.
* Television (1926): The television is a device that displays moving images and sound. It was invented by Scottish inventor John Logie Baird in 1926.
* Computer (1942): The computer is a device that can be programmed to carry out a set of instructions. It was invented by American inventors John Atanasoff and Clifford Berry in 1942.
* Cell phone (1973): The cell phone is a device that allows people to make and receive calls from anywhere in the world. It was invented by American engineer Martin Cooper in 1973.