| Acronym | Meaning |
| PWO | Plane Wave Orbital |
| CTBT | Comprehensive Test Ban Treaty |
| HENA | High-energy Neutral Atom |
| GIRMS | Gas Isotope Ratio Mass Spectrometry |
| RTU | Remote Terminal Unit |
| OCIS | Optics Classification And Indexing Scheme |
| PWRI | Public Works Research Institute (Japan) |
| LPIM | Low-pressure Injection Molding |
| CNRF | Cold Neutron Research Facility |
| CDD | Charge-density Distortion |