component,
constituent,
element an artifact that is one of the individual parts of which a composite entity is made up; especially a part that can be separated from or attached to a system; "spare components for cars"; "a component or constituent element of a system"
hardware -
The part of a computer that is fixed and cannot be altered without replacement or physical modification; motherboard, expansion cards, etc. Compare software.
Hardware is a general term for the physical artifacts of a technology. It may also mean the physical components of a computer system, in the form of computer hardware. Hardware historically meant the metal parts and fittings that were used to make wooden products stronger, more functional, longer lasting and easier to fabricate or assemble.
OmegaWiki Dictionary
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hardware The part of a computer that is fixed and cannot be altered without replacement or physical modification.