When critics talk about the media they are talking about the ability of a few large corporations to control the messages that go out through the various channels of mass communication. These corporations are the major senders in the mass communication process. There are more of the senders, in a newspaper for example you have journalists, printers, photographers etc. The credit of a movie also shows you the senders. In the internet you also have a lot of senders, you may also be a sender. Bloggers for example are also senders.