The Arithmetic Logic Unit (ALU) is the heart of a CPU. This is what allows the computer to add, subtract, and to perform basic logical operations.
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The ALU (Arithmetic/Logic Unit)
In computing, an arithmetic logic unit ( ALU) is a digital circuit that performs arithmetic and logical operations.
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The arithmetic logic unit or ALU performs arithmetic, logic, and integer operations. ALU was created by mathematician John von Neumann in 1945.