| Acronym | Meaning |
| RIP | RCRA Implementation Plan |
| WPT | Wave Packet Perturbation Theory |
| IGFA | Inert Gas Fusion Analysis |
| BLTM | Branched Lagrangian Transport [model] |
| ANG II | Angiotensin II |
| FIDA | Fluorescence Intensity Distribution Analysis |
| CHIRP | Core-hole Initiated Relaxation Process (in Ionic Crystals) |
| MCPF+R | Modified Coupled-pair Functional (method With) Relativistic (correction) |
| WGSATM | Working Group On The Statistical Aspects Of Trend Monitoring (ICES) |
| ICE | Interleukin 1beta-converting Enzyme |