| Acronym | Meaning |
| NRAO | National Radio Astronomy Observatory |
| PHF-OCE | Perturbative Hartree-Fock One-center Expansion |
| APT | Atomic Polar Tensor (in Ir Spectra Calcn.) |
| SHOA | Second-harmonic Optical Activity |
| NRC | Nuclear Regulatory Commission |
| ESWL | Extracorporeal Shockwave Lithotripsy |
| AF | Anaerobic Filter |
| ECMWF | European Center For Medium Range Weather Forecast |
| SH3 | Src Homology 3 |
| RISE | Radiative Inputs From Sun To Earth |