| Acronym | Meaning |
| NETAC | National Effluent Toxicity Assessment Center |
| SDSR-CI | Single And Double Excitations From Single Ref. State Function-CI Method |
| FIRST | Far Infrared And Submillimetre Space Telescope |
| FMAT | Fluorometric Microvolume Assay Technology |
| PMTR | Photomodulated Thermoreflectance |
| PCET | Proton-coupled Electron Transfer |
| WRDC | Wright Research And Development Center |
| PAHO | Pan American Health Organization |
| LHSF | Local Hyperspherical Surface Functions (in Quantum Calcns. On Reactive Scattering) |
| LOPT | Lowest-order Perturbation Theory |