Name different categories of the means of communication.

The means of communication are divided into two categories. They are means of personal and mass communication. In the former, we include postcard, letter, telegram, telephone, and now, Internet. The latter includes books, journals, magazines, newspapers, radio, television, and films. These are of two types : (a)print media (i.e., books, newspapers) and (b)electronic media (i.e., radio, television, films, computers).