| Klapprechner | laptop |
| Klappfenster | fortochka |
| Klappmesser | jack-knife jackknife |
| Pappbecher | paper cup |
| Kopfrechnen | mental arithmetic |
| Klappbrücke | bascule bridge |
| Klappen | folding |
| klappen | fold work |
| Klapper | rattle |
| klappern | clatter click rattle |
| Approche | sap |
| Türsprecher | entryphone |
| Fürsprecher | intercessor |
| Lautsprecher | loudspeaker speaker |
| Sprecher | speaker |
| Versprecher | slip of the tongue |
| Analogrechner | analog computer |
| Mikrorechner | microcomputer |
| Superrechner | supercomputer |
| anrechnen | impute |