| Acronym | Meaning |
| IRC | Intrinsic Reaction Coordinate |
| GEOSECS | Geochemical Ocean Sections |
| MDBK | Madin-Darby Bovine Kidney |
| ITTFA | Iterative Target Transformation Factor Analysis |
| PIRSS | Polarization IR Surface Spectroscopy |
| HGSI | The Human Genome Sequencing Index |
| INDO/S | INDO/spectroscopic Approxn. |
| XRMA | X-ray Microanalysis |
| CCWP-J | Close Coupling Wave Packet [in Total Angular Momentum] J [representation] (for Collision Calcns.) |
| NPA | Natural Population Analysis |