Over the past decade, as information- and computer-based systems have become larger and more complex, the importance of and reliance on systems architectures have grown substantially. A systems architecture is the framework that guides and moderates the evolution of a complex system's many interrelated elements. It provides order and rules so that hardware, software, data, and communications can work together.

"Systems architectures have emerged as the centerpieces of system development programs," notes the General Accounting Office.

The centerpiece of ...

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