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Processing unit is hardware that implements Arithmetic and Logical Operations.
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ALU stands for Arithmetic and Logic Unit, capable of performing
ADD, SUBTRACT, AND, OR, and NOT
operations.
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The ALU:
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The size of input quantities of ALU is often referred to as word length of the computer.
Many processors today have word length of 32 and 64 bit.
Processing unit also includes a set of registers for temporary storage of data and memory addressing.
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