What is the definition and history of communication media?

Media is the process through which the ideas or messages can be send from the sender to the receiver. It is the most important part of communication system.

These days communication is possible through a vast variety of media. For communication to be very effective, the communicator has to be very concious & judicious in the choice of media which will depend on various factors like the urgency of the message, the time available, the expenditure involved & the intellectual & emotional level of the receivers.