| Acronym | Meaning |
| EU | Enzyme Unit |
| ELKM | Extended Lumped Kinetic Model |
| RPO | Resonant Periodic Orbit (on Potential Energy Surface In At. Or Mol. Scattering) |
| MCC | Motor Control Center |
| COSHI | Clearinghouse For Occupational Safety And Health Information |
| CNDO/FK | Complete Neglect Of Differential Overlap/ Fischer-Kollmar |
| CIPW | Cross, Iddings, Pirrson, And Washington (for Geology Terminology) |
| SIDP | Sputter Ion Depth Profiling |
| EBEBO | Extended Bond Energy Bond Order (quantum Calcn. Method) |
| ULF | Ultra Low Frequency |