| Acronym | Meaning |
| OSRSCF | Open-shell Restricted SCF |
| MRCC | Multireference Coupled Cluster |
| ENSO | El Nino Southern Oscillation |
| MA | Malonic Acidpar |
| CSC | Client Server Computing |
| CTIOSA | Charge-transfer Infinite Order Sudden Approxn. |
| NTO | Natural Transition Orbital Method (for Excited States) |
| CWF | Coal-water Fuel |
| BCC | Brueckner Coupled Cluster |
| DAS | Dynamic Angle Spinning |