| Acronym | Meaning |
| APR | Acoustic Paramagnetic Resonance |
| FPPC | Float Program Planning Committee |
| NLLSQ | Nonlinear Least Squares |
| NTIS | National Technical Information Service |
| AP | Appearance Potential |
| NETL | National Energy Technology Laboratory |
| PEFR | Peak Expiratory Flow Rate (lung Function) |
| ESID | Environmental Statistics And Information Division |
| LED | Longitudinal Eddy Current Delay |
| STAT | Slotted Tube Atom Trap |