| Acronym | Meaning |
| ROSS | River Oil Spill Simulation |
| DSDP | Deep Sea Drilling Project |
| RPA | Random Phase Approximation |
| NSE | Neutron Spin Echo |
| TLHJ | Triple-layer Heterojunction |
| MPNO | Molecular Pair Natural Orbital |
| P-T-T-D | Pressure-temperature-time-deformation Path (for Metamorphic Rocks) |
| HF | Heart Failure |
| FIPS | Federal Information Processing Standard |
| SCIA | Semiclassical Impact Approxn. (in Ionizing At. And Mol. Collision Calcns.) |