| Wahlsystem | voting system |
| Zahlensystem | number system |
| Schulsystem | school system |
| Wahlsieg | election victory |
| Wahlzettel | ballot |
| Oktalsystem | octal numeral system |
| Dateisystem | file system |
| Typsystem | type system |
| Exosystem | exosystem |
| IT-System | IT system |
| Leitsystem | distributed control system |
| Subsystem | subsystem |
| System | system structure |
| Tonsystem | pitch space |
| Waffensystem | weapon systems |
| Ökosystem | ecosystem |
| Zahnzyste | odontogenic cyst |
| Wahlspruch | motto |
| Wahrsagen | divination |
| wahrsagen | augur |