| Acronym | Meaning |
| MBR | Membrane Bioreactor |
| OAR | Office Of Air And Radiation (USEPA) |
| GRASS | Gradient Recalled Acquisition In The Steady State |
| PST | Porcine Somatotropin |
| BTK | Bruton Tyrosine Kinase |
| F4 | Fourth-order Feenberg (quantum Theory) |
| SILAR | Successive Ionic Layer Adsorption And Reaction |
| PDPID | Pulsed Discharge Photoionization Detector |
| FI | Field Ionization |
| DDM | Decoupled Direct Method |