| Acronym | Meaning |
| EPOCA | Environmental Project On Central America |
| DPP | Dual Purpose Plant |
| VCM | Variational Cellular Method (for Electronic Structure Calcns.) |
| TLP | Transient Liquid Phase |
| ACCD | Approximate Double Substitution Coupled Cluster Method |
| APHEA2 | Air Pollution And Health: A European Approach 2 |
| PSCI | Partitioned (orbital Hessian) Super-configuration Interaction |
| GOME | Global Ozone Monitoring Experiment |
| ICE | International Common Elements |
| IAM | Independent Atom Model |