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Reduced Instruction Set Computers A reduced instruction set computer (RISC) is a type of microprocessor architecture that has applied the following architectural changes to the organization of a processor to improve its computing performance: e ARISC's instruction set only has a limited number of instructions. e ARISC's CPU accesses the memory and input/output (I/O) devices through separated data communication buses, which allows for more parallel computing. This is in contrast to a conventional processor architecture, where the CPU, memory, and I/O devices all share the Same data communication bus. e ARISC's CPU can execute most instructions in one clock cycle. Review this detailed introduction to the concepts of a RISC. A RISC is very efficient due to its ability to execute most instructions in one clock cycle, which is a feature that sets it apart from non-RISC computers, which require multiple clock cycles to execute one instruction. These non-RISC computers are known as complex instruction set computers (CISCs)