| Acronym | Meaning |
| ISSJ | International Scientific Station Of The Jungfraujoch (atm. Observatory |
| HHOB | High-energy Higher-order Born (approxn. For Scattering Calcns.) |
| BSPT | Blizzard Santry Perturbation Theory |
| HBT | Hanbury Brown Twiss (interferometry) |
| FLIR | Forward-looking Infrared |
| HSI | Hyperthermal Surface Ionization |
| CETP | Channel Equiv. Of A Theor. Plate |
| CAIS | Calcium-aluminum-rich Inclusions |
| FORS | Fully Optimized Reaction Space |
| MLVSS | Mixed Liquor Volatile Suspended Solids |