In all the webpages, placing your mouse over the acronym returns its definition
| APS | Active Pixel Sensor |
| AR | Active Region OR Acceptance Review |
| ASIC | Application-Specific Integrated Circuit |
| AU | Astronomical Unit |
| BOL | Beginning Of Life |
| CCD | Charged Coupled Device |
| CEB | Common Electronics Box |
| CH | Coronal Hole |
| CME | Coronal Mass Ejection |
| CMOS | Complementary Metal Oxyde Semiconductor |
| COR | Coronagraph (of SO) |
| CPU | Central Processing Unit |
| DEM | Differential Emission Measure |
| DN | Digital Number |
| EDM | EUI Data Manager |
| EEPROM | Electrically-Erasable Programmable Read-Only Memory |
| EID | Experiment Interface Document |
| EIT | Extreme-ultraviolet Imaging Telescope (SOHO) |
| EOL | End of Life |
| EPD | Energetic Particle Detector of SO |
| EQM | Engineering Qualification Model |
| ESA | European Space Agency |
| EUI | Extreme UV Imagers |
| EUS | Extreme UV Spectrometer |
| FEE | Front End Electronics |
| FOV | Field of View |
| FPA | Focal Plane Assembly |
| FPGA | Field-Programmable Gate Array |
| FSI | Full Sun Imager |
| FUV | Far UV |
| HK | Housekeeping |
| HRI | High Resolution Imager |
| HRM | Heat Rejection Mirror |
| HS | Heat Shield |
| HV | High Voltage |
| ICDR | Instrument Critical Design Review |
| IDSR | Instrument Design Status Review |
| IFAR | Instrument Flight Acceptance Review |
| IPDR | Instrument Preliminary Design Review |
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| IQR | Instrument Qualification Review |
| IR | Infrared |
| LED | Light-Emitting Diode |
| MAG | Magnetometer (of SO) |
| MAR | Multiple Adaptive Reset |
| MCP | Micro-Channel Plate |
| MTF | Modulation Transfer Function |
| NASA | National Aeronautics and Space Administration |
| NRT | Near Real Time |
| PDMU | Packet Data Management Unit |
| PER | Perihelion |
| PFM | Proto Flight Model |
| PROM | Programmable Memory |
| PSF | Point Spread Function |
| QE | Quantum Efficiency |
| QS | Quiet Sun |
| RMS | Root Mean Square |
| RN | Readout Noise |
| ROB | Royal Observatory of Belgium |
| RPW | Radio and Plasma Wave Analyser of SO |
| RTC | Real Time Control |
| S/C | Spacecraft |
| SC | Solar Constant |
| SO | Solar Orbiter |
| SOHO | Solar and Heliospheric Observatory (ESA/NASA) |
| SPP | Solar Probe Plus |
| STIX | Spectrometer/Telescope for Imaging X-rays (SO) |
| STM | Structure and Thermal Model |
| SW | SpaceWire |
| SWA | Solar Wind Plasma Analyzer of SO |
| TBC | To be confirmed |
| TBD | To be defined |
| TM | Telemetry |
| TR | Transition Region |
| TRACE | Transition Region And Coronal Explorer (NASA) |
| UCL | University College London |
| UV | Ultraviolet |
| VAULT | Very high Angular resolution Ultraviolet Telescope |
| VIM | Visible-Light Imager and Magnetometer |
| px | pixel |
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