| Acronym | Meaning |
| HPW | High Pressure Welding |
| BWCC | Brillouin-Wigner Coupled-cluster (theory) |
| IRE | Interferon-responsive Element |
| RFT | Respirator Fit Test |
| AECMA | European Association Of Aerospace Manufacturers |
| QWIP | Quantum Well IR Photodetector |
| OLS | Ordinary Least Squares |
| NMIJ | National Metrology Institute Of Japan |
| BCRW | Bridge Contacted Ridge Waveguide |
| AU | Astronomical Unit |