| Acronym | Meaning |
| BRC | Basic Regulatory Control |
| OPAL | Omni-Purpose Apparatus At LEP |
| API | Air Pollution Index |
| CLU-IN | Clean-Up Information Bulletin Board System (formerly OSWER-BBS) |
| GSMT | Giant Segmented Mirror Telescope |
| G-CSF | Granulocyte Colony-stimulating Factor |
| ENDOR | Electron Nuclear Double Resonance |
| SPADA | Simulation Program For Air Dust Concentration Analysis |
| ACEI | Angiotensin Converting Enzyme Inhibitor |
| HBN | Hexagonal Boron Nitride |