| Acronym | Meaning |
| NIST | National Institute Of Standards And Technology (formerly NBS) |
| TSSMS | Time Sharing Service Management System |
| GSAS | Generalized Structure And Anal. Software |
| FMM | Fast Multipole Method (algorithm For Coulomb Interactions Among Charge Distributions) |
| RATM | Renormalized Average T-matrix (for D.-of-states Calcns.) |
| HPLC | High-performance Liquid Chromatography |
| DBP | Dibutyl Phthalate |
| VEELS | Valence Electron Energy-loss Spectroscopy |
| CPR | Chemically Perturbed Region |
| SPM | Scanning Proton Microprobe |