| Datenbankschlüssel | database key |
| Tenorschlüssel | tenor clef |
| Notenschlüssel | clef |
| Funkschlüssel | fob |
| Bassschlüssel | F clef |
| Baßschlüssel | bass |
| Bratschenschlüssel | alto clef |
| Zentralschlüssel | master key |
| Gabelschlüssel | open end spanner |
| Generalschlüssel | master key passe-partout passkey |
| Inbusschlüssel | Allen wrench |
| Datenbanktabelle | database table table |
| Datenbanktrigger | database trigger |
| Satellitenschüssel | dish |
| Altschlüssel | alto clef |
| Fremdschlüssel | foreign key |
| Hauptschlüssel | master key |
| Hausschlüssel | housekey |
| Primärschlüssel | primary key |
| Violinschlüssel | G clef |