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The term pattern relates to the use of patterns in architecture. A pattern is the formalization of a problem/solution pair, used to make an object-oriented design decision. The purpose of a pattern is to codify existing design knowledge so that developers are not constantly re-inventing the wheel. Also, by naming these patterns, it eases communication among developers. The term pattern was first coined by Christopher Alexander et al. in 1977. * [Source: Patterns in Object-Oriented Development]

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