The long distance communication was revolutionised by the invention of
Printing machine
Radio
News papers
Telephones
The fastest and the most convenient means of sending spoken message is
Visual communication system
Telegram
Letter
The inventor of radio is
Guglielmo Marconi
Johann Gutenberg
J.C Bose
Lohn Logie Baird
The printing machine was invented in the year
1223
1333
1443
1553
The communication signals are sent to other countries through
Satellites
Radio waves
E-mails
Computers
The fastest and efficient way of sending information around the world is
Telegraph
Television
Internet
Find the odd one.
Aeroplane
Car
Taxi
Train
