| Acronym | Meaning |
| FLMTO | Film Linearized Muffin-tin Orbital (for Surface Electronic Structure Calcns.) |
| FEM | Free Electron Model |
| AQPS | Air Quality Prediction System |
| ISGO | International Structural Genomics Organization |
| RLCA | Reaction-limited Cluster Aggregation |
| PHBTD | (number)projected-hartree-bogolyubov Tamm-dancoff(quantum Method) |
| EMCOR | European Minor Constituent Radiometer |
| AAPDI | Anisotropic Atom Point Dipole |
| ULPA | Ultra Low Penetration Air |
| MVC | Mechanical Vapor Compression |