| Subject | English | Norwegian Bokmål |
| math. | asymptotically efficient estimator | asymptotisk effektive estimatoren |
| math. | efficient estimator | effektiv estimator |
| comp., MS | Efficient File Storage | Effektiv fillagring (A storage method in which a file is split into pieces that are stored and updated separately, and streamed together when a user requests the file) |
| comp., MS | Efficient File Transfer | Effektiv filoverføring (A feature that breaks a file up into granular chunks so that during re-open and re-save scenarios only the differences between client and server are sent over the network) |
| math. | most efficient estimator | mest effisiente estimator |
| math. | most efficient estimator | markovestimator |