| Acronym | Meaning |
| MCQDA | Multichannel Quantum Defect Analysis |
| PPHM | Parts Per Hundred Million |
| COMARO | Composite Magic-angle Rotation |
| EPROM | Erasable Programmable Read Only Memory |
| NSH | Normalized Spherical Harmonic (hamiltonian) |
| BPCT | Best Practicable Control Technology |
| CASS | Cyclic Activated Sludge System |
| CGCC | Coal Gasification/combined Cycle |
| LAI | Leaf Area Index |
| ICSI | Intracytoplasmic Sperm Injection |