Radio is an immensely powerful medium. Its free-to-air nature, ease of reception, affordability and diversity of receiver sets, ease of listenership at all places and at all times distinguish it from other forms of media and place it at an advantageous position to inform, educate and entertain the people.

Terrestrial radio started in the year 1923 as a private initiative after temporary permissions were given to radio clubs in Kolkata, followed by Mumbai and Chennai. Thereafter, the government stepped in 1930 and it remained in government domain for nearly seven...