| Acronym | Meaning |
| HMES | Hough Mode Extensions |
| TIP | TIROS Information Processor |
| MDS | Minimum Detectable Signal |
| L | Lunar |
| NCC | National Climate Center |
| N-SCAT | NASA Scatterometer |
| IMP | Interface Message Processor ARPANET |
| TREC | Tracking Radar Echoes By Correlation |
| NCMC | Non-Classical Mesoscale Circulations |
| AVCS | Advanced Vidicon Camera Service |