| Subject | English | Danish |
| el. | distribution system operator | distributionssystemoperatør |
| energ.ind., el. | electricity transmission system operator | operatør af eltransmissionssystem |
| energ.ind., el. | electricity transmission system operator | operatør af transmissionssystem for el |
| energ.ind., el. | electricity transmission system operator | systemansvarlig |
| energ.ind., el. | electricity transmission system operator | transmissionssystemoperatør |
| energ.ind. | European Network of Transmission System Operators | europæisk net af transmissionssystemoperatører |
| el. | European Network of Transmission System Operators for Electricity | det europæiske net af elektricitetstransmissionssystemoperatører |
| el. | European Network of Transmission System Operators for Electricity | ENTSO for elektticitet |
| energ.ind. | European Transmission System Operators | europæiske transmissionssystemoperatører |
| energ.ind. | gas transmission system operator | operatør af gastransmissionssystem |
| energ.ind. | gas transmission system operator | operatør af transmissionssystem for gas |
| energ.ind. | gas transmission system operator | transmissionssystemoperatør |
| energ.ind. | independent system operator | uafhængig systemoperatør |
| fin. | payment systems operator | betalingssystemoperatør |
| proced.law., fin. | receiving system operator | modtagende systemoperatør |
| proced.law., fin. | system operator | systemoperatør |
| energ.ind., el. | transmission system operator | operatør af transmissionssystem for el |
| energ.ind. | transmission system operator | operatør af gastransmissionssystem |
| energ.ind. | transmission system operator | operatør af transmissionssystem for gas |
| energ.ind., el. | transmission system operator | systemansvarlig |
| energ.ind., el. | transmission system operator | operatør af eltransmissionssystem |
| energ.ind., el. | transmission system operator | transmissionssystemoperatør |