| Acronym | Meaning |
| O-O | Object-oriented |
| JOSS | Joint Office For Science Support |
| ETEC | Energy Technology Engineering Center |
| BSD UNIX | Berkeley Software Distribution UNIX |
| QPF | Quantitative Prediction Of Precipitation |
| SSEC | Space Science And Engineering Center |
| EDS | Electronic Data Systems |
| TDF | Technology Development Facility |
| NUWIG | National Uranium Resource Evaluation |
| KNMI | Koninklijk Nederlands Meteorologisch Instituut |