In computer registers, MAR stands for _____.

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**Solution:**

1. MAR stands for **Memory Address Register**.

2. It is a register in the CPU that holds the memory address of the data that needs to be accessed.

3. The MAR is essential for directing data flow to and from memory, acting as a link between the CPU and memory.

4. It is used during both fetch and store operations to specify the memory location involved.

5. Other options like Main Access Register, Memory Access Register, and Main Address Register are incorrect expansions of MAR.

**Answer:** Memory Address Register

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