", "The Establishment"). Unlike the first three "filtering" mechanisms — which are derived from analysis of market mechanisms — flak is characterized by concerted and intentional efforts to manage public information . Flak from the powerful can be either direct or indirect. The direct could include the following hypothetical scenarios: Letters or phone calls from the White House to Dan Rather or William Paley Inqueries from the FCC to major television networks requesting documents used to plan and assemble a program Messages from irate executives representing advertising agencies or corporate sponsors to media officials threatening retaliation if not granted on-air reply time. The powerful can also work on the media indirectly by: Complaints delivered en masse to their own constituencies (e. g. , stockholders, employees) about media bias, Generation of mass advertising that does the same, By funding watchdog groups or think tanks engineered to expose and attack deviations in media coverage that endanger vital elite interests. Female Indian Model Photo By funding political campaigns that elect politicians who will be more willing to curb any such media deviations. Anti-Ideologies; substitutes for anti-communism A final filter is anti-ideology. "

" Contrast this with some programs that do not respond to events at all, but simply do their job and terminate. For example, an operating system command to display the current time. It displays the time and is done; it does not wait for events. For more information, see: Event-driven_programming Implementations The pattern was first described in 1979 by Trygve Reenskaug, then working on Smalltalk at Xerox research labs. This original implementation inspired many other GUI frameworks such as: The NeXTSTEP and OPENSTEP development environments encourage the use of MVC. Cocoa, based on these technologies, also uses MVC. Microsoft Foundation Classes (MFC). Anatomy Female Model Photo The Java Swing GUI library. More recently there have been attempts to apply MVC architectures for web-based interfaces. "