| Acronym | Meaning |
| FGM | Functionally Gradient Materials |
| RQDO | Relativistic Quantum Defect Orbital (method In Calcns. Of Oscillator Strengths) |
| EMZDO | Exchange Modified Zero Differential Overlap |
| ASMA | Alpha-smooth Muscle Actins |
| HABR | Hybrid Anaerobic Baffled Reactor (for Wastewater Treatment) |
| PAG | Periaqueductal Gray |
| SANDS | Stratospheric Aitken Nuclei Detection System |
| APS | Autocorrelation Photon Spectroscopy |
| CCME | Canadian Council Of Ministers Of The Environment |
| ECFS | Hot And Cold Potable Water (French; L'eau Chaude Et Froide Sanitaire) [a Class Of Pipe Application] |