| Acronym | Meaning |
 | IPM | Independent Particle Model |
| IGS | Intergenic Spacer |
| LHASA | Logic And Heuristics Applied To Synthetic Analysis |
| TENR | Technologically Enhanced Natural Radioactivity |
| MSIS | Mass Spectrometer And Incoherent Scatter |
| SCF MO | Self-consistent Field Molecular Orbital |
| SEP | Solar Energetic Particle (event) |
| NCSCI | National Center For Standards And Certification Information |
| SAGE | Soviet-American Gallium Experiment |
| ESPRIT | European Strategic Programme For Research And Development In Information Technology |
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