is a part of
instrumentality that combines interrelated interacting artifacts designed to work as a coherent entity
"he bought a new stereo system"; "the system consists of a motor and a small computer"
is a type of (narrower)
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"