| Acronym | Meaning |
| CLS | Classical Least-squares |
| SCLO | Self-consistent Local Orbital |
| LAMMS | Laser Micro Mass Spectrometry |
| SGA | Soluble-gas Atomization |
| IUPPA | The International Union Of Air Pollution Prevention Associations |
| XFH | X-ray Fluorescence Holography |
| PWPP | Plane-wave Pseudopotential |
| INDO/2-HP | INDO/2-hole Potential |
| EPTC | Extraction Procedure Toxicity Characteristic |
| IMF | Intermediate Mass Fragment |