系統

1. Origins, structure, and basic meaning

• Structure: 系統, read けいとう, denotes a lineage or classificatory line, or a functionally connected technical system.
• Basic usage: It refers both to plant lineages grouped by traits and to an electrical system operating machinery.

2. Common pitfalls and similar expressions

• Lineage and connected system
  • It can describe a biological lineage or a set of components connected into a functional system.