| Acronym | Meaning |
| NTP | Normal Temperature And Pressure |
| ARAS | Atomic Resonance Absorption Spectroscopy |
| BEPR | Biological Excess Phosphorus Removal |
| ANA | Adiabatic Nuclei Approximation (in Electron-mol. Scattering) |
| ESD | Element-Specific Detector |
| BGC | Biogeochemical Cycling |
| RBSN | Reaction-bonded Silicon Nitride |
| CIRRUS-1A | Cryogenic IR Radiance Instrumentation For Shuttle |
| SDW | Spin Density Wave |
| HAGAR | High Altitude Gas Analyzer |