Match the term to its definition buffer that holds the results until it is safe to store the results to a memory or register 1. Superscalar hardware support tor reordering instruction execution so as to avoid stalls 2. Dynamic pipeline scheduling the unit that decides when it is safe to release the result of an operation to programmer visible registers and memory3. Commit Unit 4. Reservation Station technique that enables the processor to execute more than one instruction per clock cycle by selecting them during execution 5. Reordering buffer the operation