Evolution of technology

By Nabeeha khuwaja
  • Postal system

    Postal system

    Its a mail system, used for transporting letters, packages, postcards etc.
  • Typewriter

    Typewriter

    Its a mechanical device to produce printed characters on piece of paper by typing individual keys.
  • Telephone

    Telephone

    Its a telecommunication device which allows two or more than two people to communicate when they are far apart from each other .
  • Radio

    Radio

    A technology which conveys information from one place to another through radio waves.
  • Television

    Television

    Its a device which transmits information by displaying visual images along with sound on screen.
  • Personal Computer

    Personal Computer

    Its a multi-purpose computer which performs more than one task at a time.
  • Internet

    Internet

    Its a vast network which connects all computers together and people can share information and can communicate from any part of world.
  • Mobile phone

    Mobile phone

    Its a portable telephone which is used to make a call or receive a call. Its easy to carry and access without any physical connection to network.