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[ The PC Guide | Systems and Components Reference Guide | The Processor | Processor Architecture and Operation | Internal Processor Interfaces and Operation | Performance Enhancing Architectural Features ]
Superscalar architecture refers to the use of multiple execution units, to allow the processing of more than one instruction at a time. This can be thought of as a form of "internal multiprocessing", since there really are multiple parallel processors inside the CPU. Most modern processors are superscalar; some have more parallel execution units than others.