| Acronym | Meaning |
| USDI | United States Department Of Interior |
| SEDI | Structure Of The Earth's Deep Interior |
| G- IV | Gulfstream IV |
| SOR | Successive Over Relaxation |
| BSU | Beam Steering Unit |
| NSPI | National Society For Programmed Instruction |
| JEFNIC | Jeffco Network Infrastructure Completion Project |
| LDS | Loral Defense Systems |
| SCR | Silicon Controlled Rectifier |
| SHEF | Standard Hydrometeorological Exchange Format |