ollowing headings: (I) the size, concentrated ownership, owner wealth, and profit orientation of the dominant mass-media firms; (~) advertising as the primary income source of the mass media; (3) the reliance of the media on information provided by government, business, and "experts" funded and approved by these primary sources and agents of power; (4) "flak" as a means of disciplining the media; and (5) "anticommunism" as a national religion and control mechanism. These elements interact with and reinforce one another.
media filters

Many of the first textbooks on rhetoric showed pages and pages of diagrams like these ^, of ways to position every part of your body during each of the 5 steps. There are even pages that teach the proper way for women to stand (assumedly to watch the delivery).