| Acronym | Meaning |
| PCI | Positive-ion Chemical Ionization (mass Spectrometry) |
| FSGO | Floating Spherical Gaussian Orbital |
| IRAS | Infrared Astronomy Satellite |
| RA | Reduced Aggregate (interplanetary Dust Particle) |
| IIASA | International Institute Of Applied Systems Analysis (near Vienna |
| LPA | Linearized Propagator Approximation |
| PKC | Protein Kinase C |
| RCA | Ricinus Communis Agglutinin |
| BMERC | BioMolecular Engineering Research Center |
| DWTM | Distorted Wave T-matrix (for Electron-atom Scattering) |