| Acronym | Meaning |
| CELSS | Controlled Ecological Life Support System |
| NAS | National Academy Of Science |
| HLPSA | Hazardous Liquid Pipeline Safety Act |
| MSV | Morse-Spline-van Der Waals (interatomic Potential) |
| PAC | Polyaluminum Chloride |
| BEW | Base (or Biological) Equivalent Weight |
| FAO | Floating Atomic Orbital |
| BOFSUW | Biodegradable Organic Fraction Of Solid Urban Waste |
| GCLDA | Gradient-corrected Local Density Approximation |
| SAFETI | Software For The Assessment Of Fire |