Computing term for the part of a CPU that performs arithmetic and logic operations. Often abbreviated as ALU.
The CPU's arithmetic unit performs addition and logical operations at high speed.
演算装置 is a broader term for any computing device that performs operations, while 算術演算機構 specifically refers to the arithmetic logic unit within a CPU.
Compound of 算術 (arithmetic), 演算 (operation), and 機構 (mechanism/unit). A technical term likely coined in the context of computer architecture.