| Acronym | Meaning |
| PIS | Penning Ionization Spectroscopy |
| FNAL | Fermi National Accelerator Laboratory |
| GTSSP | Global Temperature And Salinity Pilot Program |
| OCTS | Ocean Color And Temperature Sensor |
| MEED | Medium-energy Electron Diffraction |
| CAIRA | Chemical Accident/incident Response And Assistance |
| SCI | Science Citation Index |
| URG | Umweltrahmengesetz (German Environmental Protection Framework Law) |
| TDSCF | Time-dependent Self-consistent Field |
| MSIA | Mass Spectrometric Immunoassay |