| Subject | English | German |
| el. | circuit theory | Netzwerktheorie |
| electr.eng. | circuit theory | Netzwerktheorie (study of electric and magnetic systems in which the electric and magnetic phenomena are described in terms of integral quantities. IEC 60050-131-11-02 ssn) |
| phys. | circuit theory | Schaltungstheorie |
| automat. | digital control circuits theory | Theorie der Digitalregelkreise |
| automat. | pulse circuits theory | Theorie der Impulskreise |
| automat. | relay circuit theory | Relaisschaltungstheorie |
| automat. | relay circuit theory | Theorie der Relaisschaltungen |
| phys. | theory of electric circuits | Theorie der Stromkreise |
| phys. | theory of electric circuits | Schaltkreistheorie |