| Acronym | Meaning |
| QKM | Quadratic Kohn Method (variational Method For Scattering) |
| IAHE | International Association For Hydrogen Energy |
| IBS | Irritable Bowel Syndrome |
| FIIA | Flow Injection Immunoassay |
| LRAT | Long-range Atmospheric Transport |
| COC | Cleveland Open Cup (Flash Point Test Method) |
| IBAE | Ion Beam Assisted Etching |
| LOPC | Laser Optical Particle Counter |
| ISC3 | Industrial Source Complex Version 3 |
| TAFI | Thrombin Activatable Fibrinolysis Inhibitor |