| Acronym | Meaning |
| TOD | Total Oxygen Demand |
| VWN | Vosko-Wilk-Nusair (model Potential In Quantum Calcns.) |
| AFGL | Air Force Geophysics Laboratory |
| IAHE | International Association For Hydrogen Energy |
| IMA | International Mineralogical Association |
| LCI-SCSCFMO | Limited Configuration Interaction Single-configuration SCF MO |
| PON | Pump Octane Number |
| MIDDAS | Microdiameter Depth Adsorption Systems |
| VPN | Virtual Private Network |
| PVAL | Polyvinyl Alcohol |