| Acronym | Meaning |
| PEN | Personal Electronic Notebook |
| ARPA | Augmented Random Phase Approximation |
| CCSA | Classical Cintrifugal-sudden Approxn. |
| MIGD | Million Imperial Gallon Per Day |
| ICARUS | Imaging Cosmic And Rare Underground Signal |
| OCCSD | Open-shell Coupled-cluster (with) Single (and) Double (excitations) |
| CTF | Common Translation Factor (for Ion-atom Inelastic Collisions) |
| CDD | Chlorinated Dibenzo-p-dioxin |
| MELODRAMA | Melding Of Spin-locking Dipolar Recovery At The Magic Angle |
| PDA | Photodiode Array |