| Acronym | Meaning |
| KIPO | Korean Intellectual Property Office |
| GOPW | Gaussian Orthogonalized Plane Wave |
| DAF | Dissolved Air Flotation |
| DARC | Dielectric Antireflection Coating |
| DSW | Dirac Scattered-wave (often As SCF-X(alpha)-DSW Method) |
| SD-MBPT | Single (and) Double (substituted States) Many-body Perturbation Theory |
| NAAQS | National Ambient Air Quality Standards |
| PQC | Piezoelectric Quartz Crystal |
| APUMPN | Approximately Projected Unrestricted Moeller-Plesset Nth-order |
| TBN | Total Base Number |