| Acronym | Meaning |
| LCMVAO | Linear Combination Of Modified Valence Atomic Orbital |
| VU-CCSD/R | Valence Universal-coupled Cluster (with) Single (and) Double (excitations) (r = Radial Components Of The Cluster Amplitudes) |
| APO B | Apolipoprotein B |
| ACT | Activated Complex Theory |
| RIA | Reactivity Initiated Accident |
| BAQ | Building Air Quality |
| IWOP | Integration Within (an Ordered Product Of) Operators |
| CCRM | Coupled-channel Reactance Matrix (in Atom Surface Scattering) |
| SAPHIR | Spectrometer Arrangement For Photon Induced Reactions |
| IDEAL | International Digital Electronic Access Library |