| Acronym | Meaning |
| IRR | Internal Rate Of Return |
| GPMS | Galileo Probe Mass Spectrometer |
| HTPB | Hydroxy-terminated Polybutadiene |
| IUPAP | International Union Of Pure And Applied Physics |
| OFPT | Operator Form (of) Perturbation Theory |
| CCMS | Committee On Challenges Of Modern Society (NATO) |
| HL | Mustard-Lewisite Mixture |
| ARGOS | Advanced Research And Global Observation Satellite |
| FDS | Field Desorption Spectrometry |
| FPLV | Feline Panleukopenia Virus |