| Acronym | Meaning |
| UCID | Unrestricted CI (with) Single (and) Double (excitations) |
| CASR | Chemical Activity Status Report |
| EOPP | Earth Observation Preparatory Program |
| GRINDOL | Ghost (and) Rydberg INDO |
| POAM | Polar Ozone And Aerosol Measurements |
| OCT | Optical Current Transducer |
| KHN | Knoop Hardness |
| EBL | Extragalactic Background Light |
| NWSIA | National Water Supply Improvement Association |
| NURE | National Uranium And Resource Evaluation |