| Acronym | Meaning |
| BTV | Breakthrough Volume (sorption Capacity Measurement) |
| API | Air Pollution Index |
| CWS | Coal Water Slurry |
| ONDOR | Optical Nuclear Double Resonance |
| TBM | Thyssen Blowing Metallurgy |
| EFA | Essential Fatty Acid |
| IRM | Information Resources Management |
| MSS | Mobile Servicing Station [space Station] |
| BCF | Bulked Continuous-filament |
| SWR | Standing Wave Ratio |