| Acronym | Meaning |
| PNDDO | Partial Neglect Of Diatomic Differential Overlap |
| IPAC | Infrared Processing And Analysis Center |
| PPCP | Pharmaceuticals And Personal Care Products |
| PON | Particulate Organic Nitrogen |
| FOS | Fiber Optic Sensor |
| BNF | Biological Nitrogen Fixation |
| GMO | Genetically Modified Organism |
| CFRC | Carbon Fiber-reinforced Cement |
| COMA | Cometary Mass Analyzer |
| LPLC | Low Pressure Liquid Chromatography |