| Acronym | Meaning |
| HBJ | Hougen-Bunker-Johns (Hamiltonian For Mol. Calcns.) |
| EMCOR | European Minor Constituent Radiometer |
| SINDO/F | SINDO Free Of Empirical Parameters |
| DGGE | Denaturing-gradient Gel Electrophoresis |
| CPED | Convergent Probe Electron Diffraction |
| ISM | Intersecting Spheres Model (for Electronic-structure Calcns.) |
| DDRP | Direct Delayed Response Program (for Long Term Effects Of Acid Rain) |
| DAB | Dipole Adapted Basis (wave Function) |
| PDI | Polarization-division Interferometry |
| RAGS | Risk Assessment Guidelines For Superfund Sites |