| Acronym | Meaning |
| CSGT | Continuous Set Of Gauge Transformations |
| CTA | Classical Trajectory Approximation (in Mol.-collision Calcns.) |
| ECCF | Equilibrium Charge-charge Flux (model In Ir Spectra Calcns.) |
| WRDC | Wright Research And Development Center |
| CFU | Colony Forming Unit (for Bacteria Counting In Water Disinfection) |
| CD-SCSAG | Centrifugal Dominant-small Curvature Semiclassical Adiabatic Ground State (tunneling Approxn.) |
| SOMO | Semioccupied Molecular Orbital |
| EMMI | Environmental Monitoring Methods Index |
| SNAP | Soluble NSF Attachment Protein |
| EC | Enzyme Commission |