| Hauptprozessor | central processing unit |
| Hauptprobe | dress rehearsal |
| Hauptrotor | rotor |
| Hauptsponsor | sponsor |
| Coprozessor | coprocessor |
| Koprozessor | coprocessor |
| Mikroprozessor | microprocessor |
| Prozessor | processor |
| Präprozessor | precompiler preprocessor |
| Schauprozess | show trial |
| Professor | professor |
| Austernmesser | oyster knife |
| Hauptader | mother lode |
| Hauptschlüssel | master key |
| Haupttäter | principal |
| Hauptärgernis | pet peeve |
| Hauptakzent | primary stress |
| Hauptgefreiter | airman first class |
| Hauptrolle | main role |
| Hauptspeise | main course main dish |