| Hepburn-System | Hepburn |
| Larsen-System | Larsen's Opening Queen's Fianchetto Opening |
| Soundsystem | sound system |
| Zehnersystem | decimal |
| Bezugssystem | frame of reference reference frame |
| Immunsystem | immune system |
| Nervensystem | nervous system |
| Sternsystem | star system |
| Zeichensystem | sign system |
| Geburtsdatum | date of birth |
| IT-System | IT system |
| K.-o.-System | knockout system |
| Atmungssystem | respiratory system |
| Glaubenssystem | belief system |
| Notensystem | stave |
| Sechsersystem | senary |
| Typsystem | type system |
| Untersystem | sub-system |
| Verdauungssystem | digestive system |
| Abgassystem | exhaust gas system exhaust system |