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Postal system
Its a mail system, used for transporting letters, packages, postcards etc. -
Typewriter
Its a mechanical device to produce printed characters on piece of paper by typing individual keys. -
Telephone
Its a telecommunication device which allows two or more than two people to communicate when they are far apart from each other . -
Radio
A technology which conveys information from one place to another through radio waves. -
Television
Its a device which transmits information by displaying visual images along with sound on screen. -
Personal Computer
Its a multi-purpose computer which performs more than one task at a time. -
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
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.
