| Acronym | Meaning |
| ACPQ | Approx. Coupled-pair (theory Cor. For Connected) Quadruply (excited Clusters) |
| EGW | Electrogas Welding |
| PEM | Photoelectron Microscopy |
| CDRP | Carbon Dioxide Research Program (of US Department Of Energy) |
| HAISP | High Altitude Interactive Science Platform |
| ASPRS | American Society Of Photogrammetry And Remote Sensing |
| RMP4 | Restricted Moeller-Plesset Fourth-order (perturbation Theory) |
| FTTA | Federal Technology Transfer Act |
| HFA | Humic And Fulvic Acids |
| CSRS | Coherent Stokes-Raman Spectroscopy |