| Acronym | Meaning |
| APCA | Air Pollution Control Association |
| AERC | Association Of Ecosystem Research Centers |
| QAMS | Quality Assurance Management Staff (US EPA) |
| GMA | Glycidyl Methacrylate |
| TRM | Thermoremanent Magnetization |
| ESTN | Electron Spin Transient Nutation |
| XCC | Expectation-value Coupled-cluster (in Correlation Energies And Electronic Properties Of Many-electron Systems Calcns.) |
| PIDAS | Portable Instantaneous Display And Analysis Spectrometer |
| CMX | Connected-moments Expansion |
| COSE | Committee On Optical Science And Engineering |