When information-processing theorists use the term hardware, they are often referring to

Brain structure involved in memory

Explanation:

The brain is a crucial part of the body. It contains many different parts with different task quality. Every part of the brain has its specific role-playing in the brain. Every part has their value and importance. There are some parts of the brain involved in the memory of a person.  

These are some brain parts that involved in-memory processing and that plays a part in the hardware.  

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