| Acronym | Meaning |
| LCHOP | Linear Combination (of) Harmonic Oscillator Products |
| PRS | Perturbed Rotational State (method For Ion-mol. Collisions) |
| DMCC | Dimethylcarbamyl Chloride |
| PAGIF | Polyacrylamide Gel Isoelectric Focusing |
| TEMA | Tubular Exchanger Manufacturers Assocn. |
| NVPA | No-virtual-pair Approxn. |
| DISI | Direct-injection Spark-ignition |
| BO | Born Oppenheimer |
| ZOAO | Zero Overlap Of Atomic Orbital Approxn. |
| BEJ | Best Engineering Judgement |