| Acronym | Meaning |
| CAS-SCF | Complete Active Space SCF (a CI-type Method) |
| NARE | North Atlantic Regional Experiment |
| PPR | Projection Pursuit Regression |
| ECS | Electroconvulsive Shock |
| SAC | Symmetry-adapted Cluster (expansion Method For Calcg. Wave Functions) |
| BTV | Breakthrough Volume (sorption Capacity Measurement) |
| LAER | Lowest Achievable Emission Rate |
| SSCAD | Spherical Self-consistent Atomic Deformation |
| SEP | Standard Error Of Prediction |
| SPADA | Simulation Program For Air Dust Concentration Analysis |