| Acronym | Meaning |
| IASAP | International Arctic Seas Assessment Project |
| MP4(DQ) | Moeller-Plesset Perturbation Treatment To Fourth Order In The Space Of Double And Quadruple Substitutions |
| ISFSI | Independent Spent Fuel Storage Installation |
| IRED | Ion Radiation-enhanced Diffusion |
| NOS | Not Otherwise Specified |
| FDDI | Fiber-Distributed Data Interface |
| MRSD-CI+D | MRSD-CI (with) Davidson Correction |
| MAHRSI | Middle Atmosphere High Resolution Spectrograph Investigation |
| FALS | Familial Amyotrophic Lateral Sclerosis |
| PERI | Pharmaceutical Education And Research Institute |