were the first carriers of messages.

The most famous use of pigeon post happened in Paris at the time of the              war in 1870- 71.

The                 used pigeons to communicate the names of the winners at the Olympic Games to other cities.

Marconi shared the Nobel Prize in Physics with Karl Ferdinand Braun for which year ?

On                         Marconi sent the first wireless communication over sea for a distance of six kilometers.

What is the technichal term for " change into understandable language" ?

Who invented television ?

The credit for inventing the first practical telephone goes to                      

The Morse Code was introduced by Samuel Morse in the year                   

The earliest use of cryptography is known to have been in