| Acronym | Meaning |
| IAGA | International Association Of Geomagnetism And Aeronomy |
| CTARC | Chemical Testing And Assessment Research Commission |
| IOS | Infinite Order Sudden Approximation |
| LISA | Laser Interferometer Space Antenna |
| RBCA | Risk-based Corrective Action |
| SPP | Surface Plasmon Polariton |
| ETB | Extended Tight-binding (method For Electronic-structure Calcns.) |
| CNDO/2-FA | Complete Neglect Of Differential Overlap First Approxn. |
| FOMBT | First-order Many-body Theory |
| FREDOPS | Fast Response Electrochromic Device On Polymeric Substrate |