This document discusses media communication and social networks. It begins by defining media communication as the storage and transmission channels used to deliver information, and distinguishes between analog and digital media. Analog media transmits continuous signals, while digital uses discrete time signals. Examples of analog media include radio, telephony, and television broadcast. Social networks are then presented as a form of digital media. The importance of social networks is explained, such as keeping people connected, updated, and providing networking opportunities. Common social networking sites like Facebook, Twitter, Google+, LinkedIn, and YouTube are implicated. In conclusion, communication systems encompass diverse applications including analog and digital media like social networks.