| Acronym | Meaning |
| DQ-RSPT | Double And Quadruple Excitation Diagrams In Rayleigh-Schroedinger Perturbation Theory |
| REELM | Reflected Electron Energy Loss Microscopy |
| IFANT | International Foundation For The Advancement Of Nondestructive Testing |
| ACT | Alternative Control Technique |
| RCM | Radiative Convective Model (of Climate) |
| LIDAR | Laser Intensity Direction And Ranging |
| FPLH | Free-Phase Liquid Hydrocarbon |
| ILDA | Intensified Linear Diode Array |
| ARS | Autonomously Replicating Sequence |
| QDFM | Quantitative DNA Fiber Mapping |