| Acronym | Meaning |
| IPU | Instrument Processor Unit |
| SCATT | Scatterometer |
| ACIS | Academic Information Systems |
| IP | Internet Protocol |
| USPHS | United States Public Health Service |
| RO | Solar Radius |
| ACFM | Actual Cubic Feet Per Minute |
| NOPS | Nimbus Observations Processing System |
| NYSERNET | New York State Educational And Research Network |
| APEX | Advance Purchase Excursion |