| Acronym | Meaning |
| BAF | Biological Aerated Filter |
| ACM | Aanderaa Current Meter |
| EPICA | European Project For Ice Coring In Antarctica |
| DIG | Diffuse Ionized Gas |
| ISPM | In-situ Particle Monitor |
| MP2(FC) | MP2(frozen Core) Only (outer) Valence Electrons Included In The Approximation |
| ORAC | Organic Reaction Accessed By Computer |
| SMBR | Submerged Membrane Bioreactor |
| OVFF | Orbital Valence Force Field |
| ZTS | Z Transition State [z = Nuclear Charge] (method For Calcg. Isoelectronic Energy Differences And Electrostatic Potentials For A |