| Acronym | Meaning |
| IRR | Internal Rate Of Return |
| STMAS | Satellite Transition Magic-angle-spinning |
| EPEBS | Enhanced Proton Elastic Backscattering |
| OCLC | Online Computer Library Center |
| EC | Enzyme Commission |
| UBFF | Urey-Bradley Force Field |
| NASBA | Nucleic Acid Sequence-based Amplification |
| ARSCF | Approximate Relativistic SCF |
| DSMS | Depth-selective Moessbauer Spectroscopy |
| CASPT | Complete Active Space-perturbation Theory |