| Acronym | Meaning |
| HBAR | High-overtone Bulk Acoustic Resonator |
| COSE | Committee On Optical Science And Engineering |
| OHCE | One-and-a-half-centered Expansion (method For Calcns. On Charge Transfer In Ion-atom Scattering) |
| COI | Constituents Of Interest |
| IGLO | Individual Gauge For Localized Orbital |
| SWANA | Solid Waste Association Of North America |
| TCSPC | Time-correlated Single-photon Counting |
| ETSAP | Energy Technology Systems Analysis Program |
| FOMBT | First-order Many-body Theory |
| OPPT | Office Of Pollution Prevention And Toxics (US EPA) |