• Telegraph- David Alter

    Telegraph- David Alter
    A telegraph is a device for transmitting and receiving messages over long distances.
  • Telephone- Alexander Graham Bell

    Telephone- Alexander Graham Bell
    It 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- Guglielmo Marconi

    Radio- Guglielmo Marconi
    Radio is the technology of signaling and communicating using radio waves
  • Television- John Logie Baird

    Television- John Logie Baird
    An electronic system of transmitting transient images of fixed or moving objects together with sound over a wire or through space by apparatus that converts light and sound into electrical waves and reconverts them into visible light rays and audible sound
  • Computer- Charles Babbage

    Computer- Charles Babbage
    Is a machine that can be instructed to carry out sequences of arithmetic or logical operations automatically via computer programming.
  • Mobile phone- Martin Cooper

    Mobile phone- Martin Cooper
    Is a small portable radio telephone. The mobile phone can be used to communicate over long distances without wires.
  • Tablet- Alan Kay

    Tablet- Alan Kay
    Is a mobile device, typically with a mobile operating system and touchscreen display processing circuitry, and a rechargeable battery in a single, thin and flat package.