| Acronym | Meaning |
| IAP | Inhibitor Of Apoptosis |
| DSVI | Diluted Sludge Volume Index |
| CGCG | Catalog Of Galaxies And Clusters Of Galaxies |
| IBV | Infectious Bronchitis Virus |
| AWM | Average Wave Function Method (in Calcns. On Scattering) |
| IGES | Institute Of Global Environment And Society |
| PTWI | Provisional Tolerable Weekly Intake |
| TEIL | Two-electron Ionization Ladder (wave Function) |
| P-T-T-D | Pressure-temperature-time-deformation Path (for Metamorphic Rocks) |
| AACC | American Association For Clinical Chemistry |