| Acronym | Meaning |
| IVO | Improved Virtual Orbital |
| JICST | Japanese Information Center Of Science And Technology |
| NACSN | North American Commission On Stratigraphic Nomenclature |
| IMPATT | Impact Avalanche Transit-time |
| NAIM | Nucleotide Analog Interference Mapping |
| RVC | Reticulated Vitreous Carbon (electrode) |
| IMSS | International Mass Spectrometry Society |
| LAMP | Lake Acidification Mitigation Project |
| NMSC | Non-melanoma Skin Cancer |
| ISCC | Intergranular Stress-corrosion Cracking |