| Inertialsystem | inertial reference frame |
| Nervensystem | nervous system |
| Vigesimalsystem | vigesimal |
| Dezimalsystem | decimal system |
| Oktalsystem | octal numeral system |
| Sedezimalsystem | hexadecimal |
| Kristallsystem | crystal system |
| Justizsystem | judiciary |
| Notensystem | stave |
| Untersystem | sub-system |
| Binärsystem | binary system |
| Entladesystem | unload system |
| IT-System | IT system |
| Leitsystem | distributed control system |
| Schriftsystem | writing system |
| Sternsystem | star system |
| Zweiersystem | binary numeral system |
| Inertgas | inert gas |
| Mineralsäure | mineral acid |
| Mineralwasser | mineral water |