| Acronym | Meaning |
| BOCLE | Ball-on Cylinder Lubricity Evaluator |
| ASBF | Aerated Submerged Biological Filter |
| HTU | Height Of Transfer Unit (in Packed Tower Aeration System) |
| PWETF | Plane-wave Electronic Translational Factor (ion-atom Collisions) |
| NDA | Nondestructive Assay |
| PSC | Polar Stratospheric Clouds (in Antarctic) |
| MTJ | Magnetic Tunnel Junction |
| CEC | Capillary Electrochromatography |
| GLIMPSE | Galactic Legacy Infrared Mid-Plane Survey Extraordinaire |
| MEXH | Multiple-energy X-ray Holography |