Focus on efficiency.At the theoretical end, this focus manifests itself in complexity theory, which groups algorithms according to their time and space requirements for execution. Closer to engineering, this becomes a focus on minimizing the number of instructions issued on a real architecture, or eliminating other bottlenecks. Most of computer science is somewhere in the middle, and involves finding an efficient (if not optimal) solution to a problem with real requirements. Much of this principle is equally applicable outside of computing; for example, in optimizing a business workflow.

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