In computer engineering, a load–store architecture is an instruction set architecture that divides instructions into two categories: memory access (load and store between memory and registers) and ALU operations (which only occur between registers).: 9–12 Some RISC architectures such as PowerPC, SPARC, RISC-V, ARM, and MIPS are load–store architectures.

In computer science, an instruction set architecture (ISA), also called computer architecture, is an abstract model of a computer.A device that executes instructions described by that ISA, such as a central processing unit (CPU), is called an implementation.. In general, an ISA defines the supported instructions, data types, registers, the hardware support for managing main memory, …