| Acronym | Meaning |
| PTDS | Photothermal Deflection Spectroscopy |
| ESS | European Spallation Source |
| CSPI | Coherent State Path Integration |
| OSWER BBS | OSWER Electronic Bulletin Board System (see CLU-IN) |
| CBA | Chemical Blowing Agent |
| LACO | Linearized Atomic Cell Orbital (in Energy-band Calcn.) |
| LRTAP | Long-range Transboundary Air Pollution |
| SLM | Supported Liquid Membranes |
| EX-MEG | Excited-mixed Exponentially Generated (wave Function) |
| GCIB | Gas Cluster Ion Beam |