| Acronym | Meaning |
| CPI | Chemical Process Industry |
| TNOA | Target Natural Orbital Approximation |
| SEHRS | Surface-enhanced Hyper-Raman Scattering |
| CSF | Colony-stimulating Factor |
| ETEC | Environmental Technology & Education Center |
| PCR | Photo-Conductive Resonance |
| BPP | Bloembergen |
| FPI | Fourier Path Integral |
| CFU | Colony Forming Unit (for Bacteria Counting In Water Disinfection) |
| FEEO | Fuel Efficient Engine Operation |