| AEM | AMMOS Element Manager |
| AMMOS | Advanced
Multi-Mission Operations System |
| APL | Applied Physics Laboratory
John Hopkins University |
| ARC | Ames Research Center |
| ATLO | Assembly, Test and
Launch Operations |
| CFI | Call For Ideas |
| CCSDS | Consultative Committee
for Space Data Systems |
| CFDP | CCSDS File Delivery
Protocol |
| CM | Configuration Management |
| DSN | Deep Space Network |
| EDL | Entry Descent and Landing |
| FFRDC | Federally Funded Research and Development Center |
| GDS | Ground Data System |
| GDSE | Ground Data System Engineer |
| GSFC | Goddard Space Flight
Center |
| IDS | Instrument Data Systems |
| JPL | Jet Propulsion
Laboratory |
| JSC | Johnson Space Center |
| KSC | Kennedy Space Center |
| LOE | Level of Effort |
| MCS | Mission Control System |
| MDN | Mission Design and Navigation |
| MGSS | Multimission Ground
Systems and Services |
| MIO | Mission Interface
Office |
| MOS | Mission Operations
System |
| MOSE | Mission Operations Systems
Engineer |
| MPS | Mission Planning and
Sequencing |
| MSA | Mission Support Area |
| MSFC | Marshall Space Flight
Center |
| NAIF | Navigation Ancillary Information Facility |
| NASA | National Aeronautics
and Space Administration |
| NEN | Near Earth Network |
| ORT | Operational Readiness
Test |
| PDS | Planetary Data System |
| PPBE | Planning, Programming,
Budgeting, and Execution |
| PSD | Planetary Science Division |
| PUG | Project User's Group |
| ROI | Return on Investment |
| SA | System Administrator |
| SC | Spacecraft |
| SLA | Service Level Agreement |
| SN | Space Network |
| SPICE | Spacecraft, Planet, Instrument,
C-matrix, Events |
| SRA | Software Release Authority |
| TPS | Third Party Software |
| UARC | University Affiliated Research Center |
| VM | Virtual Machine |