Acronyms
Space concepts are often abbreviated. Here you can find at least some of them.
| ACLS | Advanced Closed Loop System |
| ACR | NASA’s Architecture Concept Review |
| ACS | Attitude Control System |
| ANITA | Analysing Interferometer for Ambient Air |
| ASI | Italian Space Agency |
| ATV | Automated Transfer Vehicle |
| BASS | Business Applications and Space Solutions |
| CaC | Cost at Completion |
| CAS | Commercial Authentication Service |
| CLD | Commercial LEO Destination |
| CLPS | Commercial Lunar Payload Services |
| CM25 | Council Ministerial 2025 |
| CME | Coronal Mass Ejection |
| CNSA | Chinese National Space Agency |
| CO2 | Carbon dioxide |
| COL | Columbus module on ISS |
| COPUOS | Committee on the Peaceful Uses of Outer Space |
| COSPAR | Committee on Space Research |
| COTS | Commercial Of The Shelf |
| CSA | Canadian Space Agency |
| DGNSS | Differential Global Navigation Satellite System |
| DPTD | Discovery, Preparation and Technology Development |
| DSL | Deep Space Logistics |
| E3P | European Exploration Envelope Programme |
| EAC | European Astronaut Centre |
| ECLSS | Environmental Control and Life Support System |
| ECSL | European Centre for Space Law |
| EDAS | EGNOS Data Access Service |
| EGNOS | European Geostationary Navigation Overlay Service |
| EISCAT | European Incoherent Scatter Scientific Association |
| ELT | Extremely Large Telescope |
| EOL | End of Life |
| EOM | End of Mission |
| ESA | European Space Agency |
| ESA BIC | ESA Business Incubation Centre |
| ESERO | European Space Education Resource Office |
| ESM | European Service Module |
| ESO | European Southern Observatory |
| ESOC | European Space Operations Center |
| ESPRIT | European System Providing Refuelling, Infrastructure & Telecommunications |
| EUB | Exploration Utilisation Board |
| EUMETSAT | European Organisation for the Exploitation of Meteorological Satellites |
| EUSPA | European Union Agency for the Space Programme |
| EVA | Extravehicular Activity |
| ExPeRT | Exploration Preparation, Research and Technology element of Terrae Novae |
| FE | Foundational Exploration |
| FMI-ARC | The Arctic Space Centre of Finnish Meteorological Institute |
| FOC | Full Operational Capability |
| GCC | Galileo Control Centre |
| GCS | Ground Control Segment |
| GEO | Geostationary Earth Orbit |
| GER | Global Exploration Roadmap |
| GMS | Ground Mission Segment |
| GMT | Greenwich Mean Time |
| GNSS | Global Navigation Satellite System |
| GOVSATCOM | European Union Governmental Satellite Communications programme |
| GPS | Global Positioning System |
| GSMC | Galileo Security Monitoring Centre |
| GSO | Geosynchronous Orbit |
| GSTP | General Studies and Technology Programme |
| GTO | Geostationary Transfer Orbit |
| GW | Gateway |
| H2M | Humans to Mars |
| HAS | High Accuracy Service |
| HLR | Human Lunar Return |
| HLS | Human Landing System |
| HW | Hardware |
| IAF | International Astronautical Federation |
| ICES | International Conference on Environmental Systems |
| I-HAB | International Habitation module on Gateway |
| IMU | Inertial Measurement Unit |
| IMV | Inter-Module Ventilation |
| IOC | Initial Operational Capability |
| IR | Infrared |
| IRIS2 | Infrastructure for Resilience, Interconnectivity and Secure by Satellite |
| ISECG | International Space Exploration Coordination Group |
| ISRO | Indian Space Research Organisation |
| ISRU | In-Situ Resource Utilisation |
| ISS | International Space Station |
| ITU | International Telecommunication Union |
| JAXA | Japan Aerospace Exploration Agency |
| JPL | Jet Propulsion Laboratory |
| KARI | Korean Aerospace Research Institute |
| LEO | Low Earth Orbit |
| LSS | Life Support System |
| LTO | Lunar Transfer Orbit |
| M2M | Moon to Mars |
| MECO | Main Engine Cutoff |
| MELiSSA | Micro-Ecological Life Support System Alternative |
| MEO | Medium Earth Orbit |
| MIDASS | Microbial Detection in Air System for Space |
| MLM | Multipurpose Logistics Module |
| MPH | Multi-Purpose Habitat |
| NASA | National Aeronautics and Space Administration |
| NEA | Near Earth Asteroid |
| NEO | Near Earth Objects |
| NIR | Near-infrared |
| NOAA | National Oceanic and Atmospheric Administration |
| NRTK | Network Real Time Kinematic |
| OS-NMA | Open Service Navigation Message Authentication |
| P/L | Payload |
| PB-HME | Programme Board Human spaceflight Microgravity and Exploration |
| PFP | PerFluoro Propane |
| PI | Principal Investigator |
| PPP | Precise Point Positioning |
| PRS | Public Regulation Service |
| PS | Participating States |
| QA | Quality Assurance |
| RC | Radio Communication Signals |
| RF | Radio Frequency |
| ROSCOSMOS | Russian Federation Space Agency |
| RTK | Real Time Kinematic |
| RV | Re-entry Vehicle |
| S/C | Spacecraft |
| S/N | Signal-to-Noise |
| SAA | South Atlantic Anomaly |
| SAR | Search and Rescue Service |
| SAR | Synthetic Aperture Radar |
| SatCen | European Union Satellite Centre |
| SBAS | Satellite Based Augmentation System |
| SciSpacE | Science in Space Environment element of Terrae Novae |
| SCU | Spacecraft Control Unit |
| SECO | Second-stage Engine Cutoff |
| SF6 | Sulphur Hexafluoride |
| SGO | Sodankylä Geophysical Observatory |
| SLE | Sustained Lunar Evolution |
| SME | Small and Medium Enterprise |
| SPEG | Space Policy Expert Group |
| SRB | Solid Rocket Booster |
| SRM | Solid Rocket Motor |
| SSA | Space Situational Awareness |
| SSC | Swedish Space Corporation |
| SSO | Sun-Synchronous Orbit |
| SST | Space Surveillance & Tracking |
| SW | Software |
| TLE | Two-line Element Set |
| TRL | Technology Readiness Level |
| TT&C | Telemetry, Tracking and Command |
| TWG | Technology Working Group |
| UAESA | United Arab Emirates Space Agency |
| UNOOSA | UN Office for Outer Space Affairs |
| US | United States of America |
| UTC | Coordinated Universal Time |
| VTOL | Vertical take-off and landing |
| WRC | World Radiocommunication Conference |