| Acronym | Meaning |
| AFA | Average Fock Approxn. |
| CPAC | Center For Process Analytical Chemistry |
| MPI | Mass Psychogenic Illness (in Indoor Air Pollution) |
| COHSEX | Coulomb-hole (plus) Screened-exchange (approxn. In Band-structure Calcns.) |
| TPOT | Two-parameter Omega Technique |
| MSO | Molecular Spin Orbital |
| CDF | Cumulative Distribution Functions |
| SIMM | Single Inline Memory Module |
| OCD | Offshore And Coastal Dispersion (modeling Of Air Quality) |
| SCS | Semiclassical Coupled-states |