| Acronym | Meaning |
| MLE | Maximum Likelihood Estimation |
| I.E. | Id Est (Latin |
| HJ | Hic Jacet (Latin |
| BRIMS | Behavior Representation In Modeling And Simulation (conference) |
| NSB | Norges Statsbaner (Norwegian State Railways) |
| HE | Helium |
| ACTD | Advanced Concept Technology Demonstration |
| SVO | Subject |
| SPA | Spanish Language (ISO 639-2 Code) |
| OCOKA | Observation |