| Acronym | Meaning |
| TRNA | Transfer Ribonucleic Acid |
| MP4(DQ) | Moeller-Plesset Perturbation Treatment To Fourth Order In The Space Of Double And Quadruple Substitutions |
| LAKE | Clean Lakes Database (accessible Through OLS) |
| MEMPT | Many-electron Many-photon Theory (in Dynamic-polarizability Calcns. For Atoms And Ions) |
| GPT | Generalized Pseudopotential Theory |
| NLDA | Nonlocal Density Approxn. |
| LEAP | Local-electrode Atom Probe |
| JPCRD | Journal Of Physical And Chemical Reference Data |
| MR-CCI | Multireference Contracted Configuration Interaction |
| APT | Attached Proton Test |