| Acronym | Meaning |
| SD-MBPT | Single (and) Double (substituted States) Many-body Perturbation Theory |
| UFFI | Urea-formaldehyde Foam Insulation |
| ESWL | Extracorporeal Shockwave Lithotripsy |
| NACCA | North American Council Of Chemical Associations |
| OEH | One-electron Hamiltonian (quantum Method) |
| BIFL | Burst Integrated Fluorescence Lifetime |
| SXPS | Soft X-ray Photoelectron Spectroscopy |
| PAIR | Preliminary Assessment Information Rule |
| SXAPS | Soft X-ray Appearance Potential Spectroscopy |
| NSTF | North Sea Task Force (multinational Organization) |