Subsystem

(Namespace: plural glossary)

Type of term Part of the structure of a system
Synonyms or near-synonyms Layer, side system
Antonyms or near-antonyms None

A side system is a self-contained grouping of headmates in a greater system. It is the same thing or nearly the same thing as a side system, except possibly with the connotation that subsystems are hierarchal descendants of each other (or of the greater system) as opposed to being hierarchal siblings(?)