| Acronym | Meaning |
 | RTU | Remote Terminal Unit |
| GBIF | Global Biodiversity Information Facility |
| OPPT | Office Of Pollution Prevention And Toxics (US EPA) |
| OHAO | Orthogonalized Hybrid Atomic Orbital |
| WDM | Wavelength Division Multiplexing |
| PGNP | Prompt Gamma Neutron Probe |
| GPHS | General Purpose Heat Source |
| FOREGS | Forum Of European Geological Surveys |
| SPE | Solid Polymer Electrolyte |
| NCDS | NASA Climate Data System |
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