" scale model — a replica or prototype of an object built as a hobby or for research. a particular version of a series of vehicles produced by an automobile manufacturer is known as a model . Model-View-Controller (MVC) is a software architecture that separates an application's data model, user interface, and control logic into three distinct components so that modifications to one component can be made with minimal impact to the others. MVC is often thought of as a software design pattern. However, MVC encompasses more of the architecture of an application than is typical for a design pattern. Hence the term architectural pattern may be useful (Buschmann, et al 1996), or perhaps an aggregate design pattern. Operation In broad terms, constructing an application using an MVC architecture involves defining three classes of modules. Model Railroad Turntable Model: This is the domain-specific representation of the information on which the application operates. The model is another name for the domain layer. "

" Anti-Ideologies; substitutes for anti-communism A final filter is anti-ideology. Anti-ideologies exploit public fear and hatred of groups that pose a potential threat, either real or imagined. Communism once posed the primary threat according to the model. Communism and socialism were portrayed by their detractors as endangering freedoms of speech, movement, press, etc. Such a portrayal was often used as a means to silence voices critical of elite interests. With the Soviet Union's collapse, proponents of the propaganda model have argued that the functionality and credibility of anti-communism has been fundamentally compromised. Proponents state that new, more functional anathemas have arisen to take its place. Model Railroad Construction Chomsky and Herman argue that one possible replacement for anti-communism seems to have emerged in the form of "anti-terrorism". Summary Chomsky and Herman summarize their theory thus: "A propaganda model has a certain initial plausibility on guided free-market assumptions that are not particularly controversial. "