For more information on frequently used technical terms, see also the XMM-Newton Glossary.
| Acronym | Explanation |
|---|---|
| AO | Announcement of Opportunity |
| CCD | Charge Coupled Device |
| Co-I | Co-Investigator |
| DEC | Declination,  (J2000) |
| EPIC | European Photon Imaging Camera |
| ESOC | European Space Operations Centre |
| FOV | Field Of View |
| FWHM | Full Width at Half Maximum |
| GO | Guest Observer |
| GUI | Graphical User Interface |
| HEASARC | (NASA) High Energy Astrophysics Science Archive Research Center |
| MOS | Metal Oxide Semi-conductor |
| OM | Optical Monitor |
| OTAC | Observatory Time Allocation Committee |
| QLA | Quick Look Analysis (software) |
| PI | Principal Investigator |
| PIMMS | Portable, Interactive Multi-Mission Simulator |
| PSF | Point-Spread Function |
| RA | Right Ascension,  (J2000) |
| RFC | RGS Focal Camera |
| RGS | Reflection Grating Spectrometer |
| SOC | XMM-Newton Science Operations Centre |
| TBC | To Be Confirmed |
| ToO | Target of Opportunity |
| UHB | XMM-Newton Users Handbook |
| UM | Users Manual |
| URL | Unique Resource Location |
| USG | XMM-Newton User Support Group |
| WWW | World Wide Web |
| XMM-Newton | X-ray Multi-Mirror Mission |
| XRPS | XMM-Newton Remote Proposal Submission software |