| Acronym | Meaning |
| MBBR | Moving Bed Biofilm Reactor |
| MCPF+R | Modified Coupled-pair Functional (method With) Relativistic (correction) |
| PMR | Proportional Mortality Ratio |
| ASSIST | Abstract Semi-Markov Specification Interface To The SURE Tool [propulsion] |
| HGCU | Hot Gas Cleanup |
| L2MS | 2-step Laser Mass Spectrometry |
| PIC | Public Information Center |
| CPMV | Cowpea Mosaic Virus |
| UMNDO | Spin-unrestricted Modified Neglect Of Diatomic Overlap |
| HSDB | Hazardous Substances Data Bank (NLM) |