A podcast is an episodic series of digital media files which a user can set up so that new episodes are automatically downloaded via web syndication to the user's own local computer or portable media player.

File sharing is the practice of distributing or providing access to digital media, such as computer programs, multimedia (audio, images and video), documents or electronic books.

File sharing may be achieved in a number of ways.

Common methods of storage, transmission and dispersion include manual sharing utilizing removable media, centralized servers on computer networks, World Wide Web-based hyperlinked documents, and the use of distributed peer-to-peer networking.

In publishing, art, and communication, content is the information and experience(s) that is directed towards an end-user or audience.

Content is "something that is to be expressed through some medium, as speech, writing or any of various arts".

Content can be delivered via many different media including the Internet, television, audio CDs, books, magazines, and live events, such as conferences and stage performances.

Social media are computer-mediated technologies that facilitate the creation and sharing of information, ideas, career interests and other forms of expression via virtual communities and networks.

The variety of stand-alone and built-in social media services currently available introduces challenges of definition; however, there are some common features:

Across the many fields concerned with interactivity, including information science, computer science, human-computer interaction, communication, and industrial design, there is little agreement over the meaning of the term interactivity, although all are related to interaction with computers and other machines with a user interface.