Classification of communication services in two categories: (i) Personal communication. (ii) Mass Communication. Features: (i) Personal communication (a) Communication between two or more persons at personal level. (b) The Indian postal network handles parcels as well as personal written communication. (c) Cards and envelops posts and telegraph, email. (d) Telephone services like STD, ISD provide easy and comfortable network to a large number of people. (ii) Mass communication: (a) It is the communication through which one can communicate with several people at the same time. (b) It provides the entertainment and creates awareness among people about various National programmes and policies. (c) It includes print media like newspapers, magazines, book, etc., and electronic media like Radio, Television, etc.