| Acronym | Meaning |
| BSF | Below Sea Floor |
| MQDT | Multichannel Quantum Defect Theory |
| SXES | Soft X-ray Emission Spectroscopy |
| MSS | Mobile Servicing Station [space Station] |
| ISD | Ion Stimulated Desorption |
| CME | Coronal Mass Ejection |
| MSW | Municipal Solid Waste |
| ESES | Environmental Sampling Expert System |
| PS1 | Presenilin 1 |
| NHE | Normal Hydrogen Electrode |