| Quantentheorie | quantum theory |
| Quantenchemie | quantum chemistry |
| Quantenfeldtheorie | quantum field theory |
| Knotentheorie | knot theory |
| Mengentheorie | set theory |
| Dramentheorie | dramatic theory |
| Graphentheorie | graph theory |
| Zahlentheorie | theory of numbers |
| Quantenlogik | quantum logic |
| Quantentopf | quantum well |
| Quantenphysik | quantum physics |
| quantentheoretisch | quantum theoretical |
| Automatentheorie | automata theory |
| Gruppentheorie | group theory |
| Wellentheorie | wave model wave theory |
| Staatstheorie | theory of the state |
| Systemtheorie | system theory |
| Quantenoptik | quantum optics |
| Quantenphänomen | quantum phenomenon |
| Pongidentheorie | Pongidae hypothesis |