| Acronym | Meaning |
| APTT | Activated Partial Thromboplastin Time |
| DLAS | Diode Laser Absorption Spectroscopy |
| CRHF | Complex-restricted Hartree-Fock |
| PCFB | Pressurized Circulating Fluidized Bed (gasification Apparatus) |
| PD | Photoelectron Diffraction |
| CC | Coupled-cluster (quantum Calcn. Method) |
| MIBERS | Multi-ion-beam Reactive Sputtering |
| APF | Acidulated Phosphate Fluoride |
| ARIC | Acid Rain Information Clearinghouse |
| ANR | Adiabatic Nuclear Rotation (in Calcns. On Mol. Collisions) |