| Acronym | Meaning |
| NDT | Nondestructive Testing |
| NPSO | Nonpaired Spatial Orbital |
| DQT | Dissipative Quantum Tunneling (theory) |
| MARS | Membrane Anaerobic Reactor System |
| REACH | Registration |
| PDF | Probability-distribution Function |
| ERAST | Environmental Research Aircraft And Science Technology |
| HDL | High Density Lipoprotein |
| ERDA | Elastic Recoil Detection Analysis |
| RAPJ | Rotating Arc Plasma Jet |