| Acronym | Meaning |
| CPST | Classical Perturbation Scattering Theory |
| SAN | Styrene-acrylonitrile Copolymer |
| MBR | Mobil Benzene Reduction [process] |
| OMO | Orthonormal Molecular Orbital |
| BEBO/R | Relaxed Bond Energy-bond Order Method |
| MCC | Molecular Coupled-cluster (method) |
| ECMCAD | Extracellular Matrix And Cell Adhesion Molecule |
| GRACE | Gravity Recovery And Climate Experiment |
| ARIC | Acid Rain Information Clearinghouse |
| ECPA | European Crop Protection Association |