| Acronym | Meaning |
| CBO | Corrected Born-Oppenheimer (in Calcns. For Mol. Complexes) |
| ECE | Electrical Conductivity Of Saturation Extract (soils) |
| CIT | California Institute Of Technology |
| EXRHF | Extended Restricted Hartree-Fock |
| IUAPPA | International Union Of Air Pollution Prevention Associations |
| IRF | Instrument Response Function |
| VPO | Vapor Pressure Osmometry |
| CRF | Chronic Renal Failure |
| BOSS | Bistable Optically Controlled Semiconductor Switch |
| INDO/SP | Intermediate Neglect Of Differential Overlap/spin Polarization |