Abstract Factory Pattern

Abstract Factory Pattern:
A software design pattern, the Abstract Factory Pattern provides a way to encapsulate a group of individual factories that have a common theme. In normal usage, the client software would create a concrete implementation of the abstract factory and then use the generic interfaces to create the concrete objects that are part of the theme. The client does not know (nor care) about which concrete objects it gets from each of these internal factories since it uses only the generic interfaces of their products. This pattern separates the details of implementation of a set of objects from its general usage [1].

For example, a user is using a computer system. He is not aware of different processes taking place in it. RAM is designed to function in its own way in contrast to other parts of the system. Behind, there are different logics running but for the user, it is only a single click away before his job gets done within seconds.

Reference:

[1] http://www.answers.com/topic/abstract-factory-pattern