|
Fermi Large Area Telescope at SSDC: list of the used acronyms.
Note: some acronyms in Italian are also included in this list.
| 0FGL | Fermi LAT Bright Gamma-Ray Source List |
| 1D | One-dimensional |
| 1FGL | First Fermi LAT Gamma-ray Source Catalog |
| 1FHL | First Fermi LAT Hard Sources List |
| 1LAC | First Fermi LAT AGN Catalog |
| 2D | Two-dimensional |
| 2FGL | Second Fermi LAT Source Catalog |
| 2LAC | Second Fermi LAT AGN Catalog |
| 3C | Third Cambridge Radio Catalogue |
| 3D | Three-dimensional |
| 3EG | Third EGRET Catalog |
| 4C | Fourth Cambridge Radio Catalogue |
| A&A | Astronomy & Astrophysics (scientific journal) |
| AAD | Acquisizione e Archiviazione Dati |
| AAE | Astrofisica delle Alte Energie |
| AAS | American Astronomical Society |
| AC | Alternating Current |
| AC | Analysis Coordinator |
| ACD | The LAT Anticoincidence Detector Subsystem |
| ACF | Autocorrelation Function |
| ACQ | Acquisition |
| ACT | Atmospheric Cherenkov Telescope |
| ADAF | Advection Dominated Accretion Flow |
| ADC | Accretion Disk Corona |
| ADD | Accesso e Distribuzione Dati |
| ADS | Astrophysics Data System |
| AFS | Andrew File System |
| AGILE | Astro-rivelatore Gamma a Immagini Leggero (Light Astro Gamma Image detector) |
| AGL | AGILE Catalog |
| AGN | Active Galactic Nuclei |
| Ahr | Amp-hour |
| AIS | Advanced Information Systems (General Dynamics) |
| aka | Also known as |
| Alg | Algorithm |
| AMS | Alpha Magnetic Spectrometer |
| AO | Announce of Opportunity |
| AOR | Astronomical Observation Request |
| APh | Astroparticle Physics (scientific Journal) |
| APID | Application Process ID |
| ApJ | The Astrophysical Journal (scientific journal) |
| APM | Automatic Plate Measuring machine |
| APOD | Astronomy Picture of the Day |
| ARC | Archive/archiving |
| ARF | Ancillary Response File |
| ARR | Autonomous Repointing Request |
| ASCII | American Standard Code for Information Interchange |
| ASD | Astrophysics Science Division (of GSFC) |
| ASDC | ASI Science Data Center |
| SSDC | ASI Space Science Data Center |
| ASE | Astrofisica Sorgenti Extragalattiche |
| ASI | Agenzia Spaziale Italiana |
| ASM | All Sky Monitor (RXTE) |
| ASO | August September October 2008 LAT source list |
| ASP | Automatic Science Processing |
| AT | Acceptance Test |
| ATel | The Astronomer's Telegram |
| ATG | Allegato Tecnico Gestionale |
| ATS | Absolute Time Sequence |
| ATT/ANC | Attitude/Ancillary |
| AU | Astronomical Unit |
| AW | Alfvén Waves |
| AXP | Anomalous X-ray Pulsar |
| BA | Burst Advocate |
| BAL | Broad Absorption Line quasar |
| BAT | Burst Alert Telescope (Swift instrument) |
| BATSE | Burst and Transient Source Experiment on CGRO |
| BB | Blackbody |
| BBB | Big Blue Bump |
| BBN | Big Bang Nucleosynthesis |
| BBR | Blackbody Radiation |
| BGO | Bismuth Germanate |
| BHXRB | Black Hole X-ray Binary |
| BIOS | Basic Input Output System |
| Bkg | Background |
| BL Lac | BL Lacertae |
| BLR | Broad Line Region |
| BLRG | Broad Line Radio Galaxy |
| BM | Backup Manager |
| BPL | Broken Power Law |
| Bps | Bits per second |
| BR | Background Rejection |
| Brem | Bremsstrahlung |
| BSL | Bright Source List |
| BSM | Beyond Standard Model |
| BT | Beam Test |
| BT | Brightness Temperature |
| BW | Blast Wave |
| BZ- | Roma multi-frequency catalogue of known blazars |
| BZP | Blandford-Znajek Process |
| C&A | Calibration and Analysis |
| CAL | The LAT Calorimeter Subsystem |
| CALDB | Calibration Database |
| CalTech | California Institute of Technology |
| CCB | Configuration Control Board |
| CCD | Charge-coupled Device |
| CCF | Cross-correlation Function |
| CD | Core-Dominated |
| CDAF | Convection-dominated Accretion Flow |
| CDM | Cold Dark Matter |
| CDR | Critical Design Review |
| CDS | Centre de Donné astronomiques de Strasbourg |
| CEA | Commissariat a l'Energes Atomique |
| CENBG | Centre d'etudes Nucleaires de Bordeaux Gradignan |
| CERN | Centre European pour la Recherche Nucleaire |
| CF | Cosmic Fireball |
| CF | Cooling Flow |
| CFG | Configuration |
| CGA | Capitolato Generale ASI |
| CGRO | Compton Gamma-ray Observatory |
| CHIME | Cosmic ray effects on Micro-electronics |
| CHS | Commanding, Health and Safety |
| CIB | Cosmic Infrared Background |
| CM | Configuration Management |
| CMB / CMBR | Cosmic Microwave Background Radiation |
| CMD/Cmd | Command |
| CMT | Configuration Management Tool |
| CNB | Cosmic Neutrino Background |
| CNO | Carbon-Nitrogen-Oxygen |
| CNRS | Centre National de la Recherche Scientifique |
| CO | Carbon Oxygen |
| COBE | Cosmic Background Explorer |
| CoI | Co-Investigator |
| Com | Comptonization |
| COMPTEL | Compton Telescope on CGRO |
| CON | Confluence (wiki Jira system at SLAC) |
| Config | Configuration |
| COS-B | ESA second Celestial Observational Satellite |
| CPU | Central Processing Unit |
| CR | Cosmic Ray |
| CS | Cross-Section |
| CSA | Cyber Security Awareness |
| CsI (TI) | Cesium Iodide crystal doped with Thallium |
| CSS | Cascading Style Sheets |
| CSS | Compact Steep Spectrum sources |
| CSW | Core Software |
| CT | Capitolato Tecnico |
| CTA | Cherenkov Telescope Array |
| CTB | Classification Tree Bill variables |
| CTS | Coordinatore Team Scientifico |
| CU | Calibration Unit |
| CVS | open source Concurrent Versions System |
| CWT | Continuous Wavelet Transform |
| CY | Calendar Year |
| CZT | Cadmium Zinc Telluride |
| DA | Documento Applicabile |
| DAF | Data Archive Facility |
| DAPNIA | Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée |
| DAQ, EDAQ | LAT Electronics, Data Acquisition and Flight system |
| DAR | Disk Archive |
| DAS | Demand Access System |
| DAT | Data Acquisition Toolkit |
| DB | Data Base |
| DB | Doppler Boosting |
| DC | Data Catalog |
| DC | Data Challenge |
| DC | Direct Current |
| DCN | Document Change Notice |
| DD | Data Downlink |
| DD | Disk Drive |
| DE | Dark Energy |
| DEBR | Diffuce Extragalactic Background Radiation |
| Dec | Declination |
| DEL | Deliverable |
| DES | Data Encryption Standard |
| Dev | Development |
| DF | Relativistic Doppler Factor |
| DFI | Data Flow public Interface |
| DGN | Diagnostic |
| DH | Data Handling |
| Digi | Digitized Event Data |
| DISTR | Distribution |
| DL | Debye Length |
| DM | Data Mining |
| DM | Data Monitoring |
| DM | Dark Matter |
| DMNP | Dark Matter and New Physics |
| DOE | Department of Energy |
| DP | Data Processing |
| DP | Doppler Boosting |
| DPU | Data Processing Unit |
| DQ | Data Quality |
| DQM | Data Quality Monitor |
| DR | Documento di Riferimento |
| DRMNGB | Double precision Reverse communication routine that Minimize General simply Bounded objective function |
| DRP | Data Release Plan |
| DC | Data Stream |
| DS | Duty Scientist |
| DSA | Diffusive Shock Aceleration |
| DSMC | Data Services Management Center |
| DTR | Data Transmission Request |
| DWT | Discrete Wavelet Transform |
| DXRBS | Deep X-Ray Blazar Survey |
| EA | Effective Area |
| EBL | Extragalactic Background Light |
| EC | Event Class |
| EC | European Commission |
| EC | External Compton |
| ECC | External Compton from Clouds |
| ECD | External Compton from Disk |
| ECE | Error Circle Explorer |
| ED | ELSAG DATAMAT |
| ED | Event Data |
| EE | Error Ellipse |
| EED | Electron Energy Distribution |
| EGRB | Extragalactic Gamma-Ray Background |
| EGRET | Energetic Gamma Ray Experiment Telescope on CGRO |
| EGSE | Electrical/Electronics Ground Support Equipment |
| EIC | External Induced Compton |
| EL | Eddington Limit |
| ELV | Expendable Launch Vehicle |
| EM | Electromagnetic |
| EMS | Eleven Month Source |
| EMSS | Einstein satellite Medium Sensitivity Survey |
| Eng | Engineer/Engineering |
| ENLR | Extended Narrow Line Region |
| EOS | Equation of State |
| EOS | ASI Esplorazione e Osservazione dello Spazio |
| EPO, E/PO | Education and Public Outreach |
| EPU | Event Processing Unit |
| ERC | External-jet Radiation Compton |
| ESA | European Space Agency |
| ESA-RSSD | ESA Research and Scientific Support Department |
| ESO | European Southern Observatory |
| ESRIN | ESA European Space Research Institute |
| ETE | End to End |
| EU | Engineering Unit |
| EU | European Union |
| EVO | Enabling Virtual Organizations teleconference system |
| EVT | Event |
| Exp | Experiment |
| Exp | Exposure |
| F2F | Face to face |
| FA | Flare Advocate |
| FAME | Flare Advocate Meeting on EVO |
| FA/GSW | Flare Advocate - Gamma-ray Sky Watcher |
| FAQ | Frequently Asked Questions |
| FAS | Full Approximation Storage algorithm |
| Fax | Facsimile |
| FDC | Fermi Data Centre (presso SSDC) |
| FDS | Finite-Difference Scheme |
| FEM | Finite Element Method |
| FER | Fermi Gamma-ray Space Telescope |
| FF | flip-flop, bistable, model |
| FFT | Fast Fourier Transform |
| FGL | Fermi Gamma-ray Space Telescope (Large Area Telescope) |
| FGST | Fermi Gamma-ray Space Telescope (deprecated) |
| FIR | Final Report |
| FIRST | Faint Images of the Radio Sky at Twenty centimetres survey |
| FITS | Flexible Image Transport System |
| FLAMCOG | Fermi LAT Multiwavelength Coordinating Group |
| FLOPS | Floating point Operations per Second |
| FO | Flight Operations |
| FOS | Flight Operations Software |
| FOT | Flight Operations Team |
| FOV | Field of View |
| FP | Framework Programme |
| FPE | Fokker-Planck Equation |
| FR | Final Review |
| FR | Fanaroff-Riley |
| FRED | Fast Rise Exponential Decay |
| FRED | Fox and Ruby Event Display |
| FS | FITS Skimmer |
| FSRQ | Flat Spectrum Radio Quasar |
| FSSC | Fermi Science Support Center (at GSFC) |
| FSW | Flight Software |
| FT1/FT2 | LAT event/spacecraft FITS files |
| FTE | Full Time Equivalent |
| FTOOLS | FITS Tools software |
| FTP | File Transfer Protocol |
| Fun | Function |
| FSW | Flight Software |
| fv | FITS viewer |
| FWHM | Full Width at Half Maximum |
| FY | Fiscal Year |
| FYI | For your interest |
| GARC | GLAST ACD Readout Controller |
| GBM | GLAST/Fermi Burst Monitor |
| Gbps | Gigabits per second |
| GC | Galactic Centre |
| gcc | GNU Compiler Collection |
| GCN | Gamma-ray Burst Coordinate Network |
| GCR | Galactic Cosmic Ray |
| GCRC | GLAST Calorimeter Read-out Controller - Digital |
| GD | General Dynamics |
| GEANT4 | Detector description and simulation tool |
| GEM | Global-Trigger Electronics Module |
| GEN | Generico |
| GeV | Giga (10^9, billion) electronvolts |
| GF | Green functions |
| GGS | Galactic Gamma-ray Source |
| GH | Galactic Halo |
| GIF | Graphics Interchange Format |
| GIOC | GBM Instrument Operations Center |
| GITD | GLAST Instrument Technology Development |
| GLAST | Gamma-ray Large Area Space Telescope |
| GLEAM | GLAST LAT Event Analysis Machine |
| GSM | Ground Mission Segment |
| GN | Ground Network |
| GNU | GNU's Not Unix |
| GO | Guest Observer |
| GOF | Guest Observer Facility |
| GPS | Global Positioning System |
| GPS | GHz-Peaked Spectrum sources |
| GPU | Graphic Processing Unit |
| GR | GLAST Release |
| GR | General Relativity |
| GRAPWG | NASA Gamma-ray Astronomy Programs Working Group |
| GRB | Gamma-Ray Burst |
| GRID | Computing grid |
| GRO | Gamma Ray Observatory |
| GS | Ground Station |
| GS | Ground System |
| GSE | Ground Support Equipment |
| GSFC | NASA Goddard Space Flight Center |
| GT | GLAST software Tool |
| GTI | Good Time Interval |
| GUI | Graphic User Interface |
| GW | Gravitational Wave |
| H&S | Health & Safety |
| HBL | High Energy peaked BL Lac Objects |
| HD | Hard Disk |
| HDF | Hierarchical Data Format |
| HDU | Header and Data Unit |
| HE | High Energy |
| HEALPix | Hierarchical Equal Area isoLatitude Pixelization of a sphere |
| HEASARC | High Energy Astrophysics Science Archive |
| HEASOFT | High Energy Astrophysics Software |
| HEP | High Energy Physics |
| HEPAP | DOE High Energy Physics Advisory Panel |
| HEPL | W.W. Hansen Experimental Physics Laboratory at Stanford University |
| HESS | High Energy Stereoscopic System |
| HEW | Half Energy Width |
| HFQPO | High Frequency Quasi-Periodic Oscillation |
| HGL | High Galactic Latitude |
| HIP | Heavy Ion Particle |
| HK/HSK | House Keeping |
| HPD | Half-Power Diameter |
| HPQ | High Polarized Quasar |
| HQ | Headquarters |
| HS | Hot Spot |
| HSP | High Synchrotron Peaked |
| HST | Hubble Space Telescope |
| HW, h/w | Hardware |
| I&T | Integration and Test |
| I/O | Input/Output |
| IACT | Imaging Atmospheric Cherenkov Telescope |
| IAU | International Astronomical Union |
| IAUC | International Astronomical Union Circular |
| IBL | Intermediate Energy peaked BL Lac Objects |
| IC | Index Catalog |
| IC | Inverse Compton |
| ICD | Interface Control Document |
| ICF | Intrinsic Correlation Function |
| ICT | Information Communication Technology |
| ICU | Instrument Control Unit |
| ID | Identification |
| IDL | Interactive Data Language |
| IDP | Instrument Data Processing |
| IDS | Interdisciplinary Scientist |
| IDV | Intraday Variability |
| IEEE | Institute of Electrical and Electronics Engineers |
| IG | Inner Galaxy |
| IGR | INTEGRAL Gamma-Ray source |
| ILS | Integrated Logistic Support |
| ILSC | Interactive LAT Source Catalog |
| IMBH | Intermediate Mass Black Hole |
| IN2P3 | Institut National de Physique Nucleaire et de |
| INAF | Istituto Nazionale di Astrofisica |
| INFN | Istituto Nazionale di Fisica Nucleare |
| INT | Interface |
| INTEGRAL | INTErnational Gamma-Ray Astrophysics Laboratory |
| IOV | In Orbit Validation |
| IP | Image Processing |
| IPAC | Infrared Processing and Analysis Center |
| IPO | Input Process Output |
| IPR | Intellectual Property Right |
| IR | Infrared |
| IRFS | LAT Instrument Response Functions |
| IS | Instrument Scientist |
| ISAS | Institute for Space and Astronautical Science, Japan |
| ISBN | International Standard Book Number |
| ISM | Interstellar Medium |
| ISOC | LAT Instrument Science Operation Center (formerly LIOC or LISOC) |
| ISP | Intermediate Synchrotron Peaked |
| ISS | International Space Station |
| IT | Information Technology |
| ITOS | Integrated Test and Operations System |
| JD | Julian Date |
| JIRA | (from Gojira) Bug/issue wiki tracking management software |
| JPEG | Joint Photographic Experts Group |
| JS | JavaScript |
| JAS | Java Application Server |
| JVM | Java Virtual Machine |
| KBA | Ku-Band Antenna |
| KBH | Kerr Black Hole |
| Kbps | Kilobits per second |
| KE | Kompaneets Equation |
| KED | Kinetic Energy Dominated |
| KeV | Kilo (10^3, thousand) electronvolts |
| KF | Kalman Filter |
| KH | Kelvin-Helmholtz |
| KN | Klein-Nishina |
| KO | Kick Off |
| KP | Key Project |
| KS | Kolmogorov-Smirnov |
| KSC | NASA Kennedy Space Center |
| KTH | Royal Institute of Technology, Sweden |
| L&EO | Lunch and Early Operations |
| L0/L1/L2 | Level zero (raw after telemetry), Level one (ready for analysis), Level two (analysis results) data |
| L0P | Level zero Products |
| Lab | Laboratory |
| LAN | Local Area Network |
| LANL | Los Alamos National Laboratory |
| LAS | LAT Astro-Server |
| LAT | Large Area Telescope di Fermi |
| LATTE | LAT Test Executive |
| LBAS | Fermi LAT List of Bright AGN Sources |
| LBFGS | Limited-memory Broyden Fletcher Goldfarb Shanno method |
| LBG | Lyman-Break Galaxies |
| LBL | Low energy peaked BL Lac Objects |
| LC | Light Curve |
| LD | Lobe-Dominated |
| LDC | LAT Data Catalog |
| LDF | LAT Data Flow |
| LDP | LAT Data Products |
| LEO | Low Earth Orbit |
| LF | Luminosity Function |
| LF | Lifetime |
| LFEP | Front-End Processor |
| LFQPO | Low Frequency Quasi-periodic Oscillation |
| LGL | Low Galactic Latitude |
| LHC | Large Hadron Collider |
| LHEA | Laboratory for High Energy Astrophysics at NASA |
| LHK | LAT Housekeeping |
| LICOS | LAT Instrument Checkout System |
| LISOC | LAT Instrument Science Operations Center |
| LINER | Low Ionization Emission Line Region |
| LIOC | LAT Instrument Operations Center (now ISOC ) |
| LIV | Lorentz Invariance Violation |
| LLE | LAT Low Energy data class |
| LMC | Large Magellanic Cloud |
| LOF | LAT Operations Facility |
| LP | Log Parabola |
| LPA | Output from Level 1 processing of on-orbit data |
| LPC | Linear Predictive Coding |
| LPQ | Low Polarized Quasar |
| LSA | LAT Science Analysis |
| LSF | LAT Science Format |
| LSF | Load Sharing Facility |
| LSG | LAT Collaboration Science Groups |
| LSP | Low Synchrotron Peaked |
| LSP | Lomb-Scargle Periodogram |
| LT | Lense-Thirring |
| LT | Lorentz Transformation |
| LTC | Livetime Cube |
| LUW | LAT User Workbook |
| Ly | Lyman |
| LY | Light Year |
| m | meter |
| µm | 10^-6 meter |
| M&S | Materials & Services |
| MAGIC | Major Atmospheric Gamma Imaging Cherenkov |
| MAR | Multiple Access Return |
| Mbps, Mb/s | Megabits per second |
| MC | Monte Carlo |
| MC | Markov Chain |
| MCC | Mission Control Center |
| MCR | Mobile Computing Rack |
| MdF | Ministero della Difesa |
| MDO | Massive Dark Object |
| MEM | Maximum Entropy Method |
| MET | Mission Elapsed Time |
| MeV | Mega (10^6, million) electronvolt |
| MGSE | Mechanical Ground Support Equipment |
| MHD | Magnetohydrodynamics |
| MILA | Meritt Island Launch Annex |
| MIP | Minimally Ionizing Particle |
| MIUR | Ministero dell'Istruzione, Università e Ricerca |
| MIT | Massachusetts Institute of Technology |
| MJD | Modified Julian Date |
| Mkn / Mkr | Markarian |
| MMIA | Multi-Mission Interactive Archive |
| MNRAS | Monthly Notices of the Royal Astronomical Society (scientific journal) |
| MOC | Mission Operation Center |
| MoU | Memorandum of Understanding |
| MP | Mission Planning |
| MPE | Max Planck Institute for Extraterrestrial Physics |
| MQ | Microquasar |
| MS | Merit Skimmer |
| MSA | Modular Smart Array |
| MSFC | NASA Marshall Space Flight Center |
| MSS | Mission System Specification |
| MSSM | Minimal Supersymmetric Standard Model |
| MST | Minimum Spanning Tree |
| MW, MWL | Multiwavelenght (i.e. Multifrequency) |
| NA | Non Applicable |
| NaI | Sodium Iodide |
| NAS | National Academy of Sciences |
| NASA | National Aeronautics and Space Administration |
| NB | Nota bene |
| NCC | Network Control Center |
| NCP | North Celestial Pole |
| NCST | Naval Center for Space Technology |
| NE | Noise Equivalent |
| NED | NASA/IPAC Extragalactic Database |
| NEF | Nuclear Enhancement Factor |
| NELG | Narrow Emission Line Galaxy |
| NEP | North Ecliptic Pole |
| NFS | Network File System |
| NGC | New General Catalogue |
| NGP | North Galactic Pole |
| NLRG | Narrow Line Radio Galaxy |
| NLSy1 | Narrow Line Seyfert 1 Galaxy |
| NLT | Non LAT Team |
| NOA | New Obligation Authority |
| Nom | Nominal |
| NORAD | North American Air Defense Command |
| NP | Narrative Procedures |
| NR | Numerical Recipes |
| NRA | NASA Research Announcement |
| NRL | Naval Research Laboratory |
| NRL | Narrow Line Region |
| NS | Neutron Star |
| NSE | Navier-Stokes Equation |
| NSF: | National Science Foundation |
| NSSTC | National Space Science and Technology Center |
| NuSTAR | Nuclear Spectroscopic Telescope Array |
| NVSS | NRAO VLA Sky Survey |
| O- | Ohio State University Radio Survey Catalog |
| OAR | INAF Osservatorio Astronomico di Roma |
| OCD | Operational Concept Document |
| OEM | Original Equipment Manufacturer |
| OGIP | Office of Guest Investigator Programs |
| Opr | Operational |
| Ops | Operations |
| Org | Organization |
| OS | Operating System |
| OSS | NASA Office of Space Science |
| OSSE | Oriented Scintillation Spectrometer Experiment on CGRO |
| OSU | The Ohio State University |
| OVV | Optically Violent Variable |
| P6/P7/P8 | Pass 6/7/8 version of the LAT Instrument Response Functions |
| Par | Paragraph |
| PASP | Publications of the Astronomical Society of the Pacific (scientific Journal) |
| PB | Publication Board |
| PBH | Primordial Black Hole |
| PBH | Primordial Black Hole |
| pc | Parsec |
| PDB | Project Database |
| PDE | Partial Differential Equation |
| PDG | Particle Data Group |
| PDMP | Project Data Management Plan |
| PDR | Preliminary Design Review |
| PDS | Power Density Spectrum |
| PDT | Pacific Daylight Time |
| PDU | Packet Data Unit |
| PDU | Power Distribution Unit |
| PE | Pulsar Ephemerides |
| PE | Pulsar Ephemerides |
| PEG | Passive Elliptical Galaxy |
| PGW | Perugia Wavelet |
| PHA | Pulse Height Analyzer |
| PhD | Philosophiae Doctor (doctor of philosophy) |
| Phot | Photometry |
| PI | Principal Investigator |
| PIC | Proton-Induced Cascade |
| PIMMS | Portable, Interactive, Multi-Mission Simulator |
| Pipe | Pipeline |
| PKS | Parkes Radio Catalog |
| PL | Perl |
| PLA | Pianificazione del progetto |
| PLN | Planning |
| PMT | Photon Multiplier Tube |
| PNG | Portable Graphic Network |
| POE | Public Outreach and Education |
| Pol | Polarization |
| Poy | Poynting |
| PP | Parent Population |
| PP | Pair Production |
| PRA | Public Relation Activity |
| PRF | Performance |
| PRJ | Schema del progetto |
| PRL | Physical Review Letters |
| Proc | Procedure |
| Prod | Production |
| PRR | Progress Report |
| PS | Point Source |
| PS | Postscript |
| PSA | Point Source Analysis |
| PSD | Power Spectral Density |
| PSF | Point Spread Function |
| PSN | Piano Spaziale Nazionale |
| PSPC | Position Sensitive Proportional Counter |
| PSR | Pulsar |
| PST | Pacific Standard Time |
| PT | Product Tree |
| PTUGP | Pulsar Timing Using Geocentered Photons |
| PVO | Performance, Verification, and Optimization |
| PWN | Pulsar Wind Nebula |
| QDE | Quantum Detection Efficiency |
| QED | Quantum Electrodynamics |
| QG | Quantum Gravity |
| QLA | Quick Look Analysis |
| QPO | Quasi-Periodic Oscillations |
| QS | Quiet Sun |
| QSO | Quasi Stellar Object |
| RA | Right Ascension |
| RA | Rocking Angle |
| RAID | Redundant Array of Independent Disks |
| RB | Relativistic Beaming |
| RBL | Radio-selected BL Lac object |
| RDBMS | Relational Data Base Management System |
| RdO | Richiesta d'Offerta |
| RDB | Relational Database |
| RDBMS | Relational Database Management System |
| RDQ | Run Data Quality |
| Recon | Reconstruction |
| Rep | Report |
| RG | Radiogalaxy |
| RHEL | Red Hat Enterprise Linux |
| RID | Reprocessing Instrument Data |
| RL | Radio Loud |
| RLF | Radio Luminosity Function |
| RLQ | Radio-Loud Quasar |
| RM | Release Manager |
| RM | Response Matrix |
| RMF | Redistribution Matrix File |
| RMS | Root Mean Square |
| ROI | Region Of Interest |
| RPM | Red Hat Package Manager |
| RQ | Run Quality |
| RQ | Radio quiet |
| RQQ | Radio-Quiet Quasar |
| RSC | Resource |
| RSP | Routine Science Processing |
| RT | Request Tracker |
| RT | Remote Terminal |
| RTS | Relative Time Sequence |
| RTT | Real Time Telemetry |
| RX | ROSAT X-ray Catalog |
| RXTE | Rossi X-Ray Timing Explorer |
| SAA | South Atlantic Anomaly |
| SAGENAP | Scientific Assessment Group for Experiments in Non-Accelerator Physics (DOE and NSF) |
| SAIt | Società Astronomica Italiana |
| SAO | Smithsonian Astrophysical Observatory |
| SAS | Science Analysis System |
| SAS | Science Analysis Software |
| SAS-2 | Small Astronomy Satellite 2 |
| SAX | Beppo-SAX, Satellite per Astronomia X |
| SB | Speakers Bureau |
| SBG | Starburst Galaxy |
| SBG | Starburst Galaxies |
| SC | Service Challenge |
| SciOps | Science Operations |
| SCIPP | Santa Cruz Institute of Particle Physics at UCSC |
| SCL | SLAC Central Linux |
| SCons | SConscript open source software development platform |
| SCP | South Celestial Pole |
| SDR | System Design Review |
| Sec | Security |
| Sect | Section |
| SED | Spectral Energy Distribution |
| SEP | South Ecliptic Pole |
| Svc | Service |
| SF | Solar Flare |
| SF | Structure Function |
| SFOF | Space Flight Operations Facility |
| SG | Starburst Galaxy |
| SGC | Science Group Coordinator |
| SGP | South Galactic Pole |
| SGR | Soft Gamma-ray Repeater |
| Sim | Simulated |
| SiS | SiS Signal in Space |
| SISS | Supporto Informatico Specialistico e Sistemistico |
| SLAC | Stanford Linear Accelerator Center |
| SMBH | Super Massive Black Holes |
| SMC | Small Magellanic Cloud |
| SME | Small and Medium Enterprise |
| SN | Supernova |
| SNR | Supernova Remnant |
| SO | Science Operations |
| SODM | Science Operation Data Monitor |
| Sor | Sorting |
| SOR | Successive Overrelaxation |
| SPE | Specifiche |
| SQL | Structured Query Language |
| SR | Schwarzschild radius |
| SR | Special Relativity |
| SRD | Science Requirement Document |
| SRS | Software Requirements Specification |
| SSA | Synchrotron Self-Absorption |
| SSAC | Senior Scientist Advisory Committee |
| SSC | Synchrotron Self Compton |
| SSD | Silicon Strip Detector |
| SSRQ | Steep Spectrum Ragio Quasar |
| SSU | Sonoma State University |
| ST | Science Tools software |
| STIL | Starlink Tables Infrastrucutre Library |
| STC | Science Timeline Calendar |
| Sto | Storage |
| STScI | Space-Telecope Science Institute |
| SU | Stanford University |
| SU-HEPL | Stanford University Hanson Experimental Physics |
| SUM | Software User's Manual |
| SUSY | Supersymmetry |
| SW, S/W | Software |
| SW | Shock Waves |
| SWG | Science Working Groups |
| Swift | Swift Gamma Ray Burst Explorer Mission |
| Sy | Seyfert |
| Sys | System |
| T&DF | Trigger and Dataflow |
| TAI | International Atomic Time |
| TB | Terabyte |
| TBC | To Be Confirmed |
| TBD | To Be Determined |
| TBR | To Be Reviewed |
| TD | Technical Document |
| TD | Tempo Determinato |
| TDA | Time Domain Astronomy |
| TDM | Tridiagonal Matrix |
| TDRSS/ TDRS | Tracking and Data Relay Satellite System |
| TE | Test Engineer |
| TE | Transport Equation |
| TEM | Tower Electronics Module |
| TeV | Tera (10^12, trillion) electronvolts |
| TF | Transfer Function |
| TGF | Terrestrial Gamma-ray Flash |
| TKR | LAT Tracker Subsystem |
| TLM | Telemetry |
| TM | Technical Meeting |
| TN | Technical Note |
| TNG | Telescopio Nazionale Galileo |
| ToO | Target of Opportunity |
| ToT | Time over Threshold |
| TPG | Trigger Pattern Generator |
| TPZ | Telespazio |
| TS | Test Statistics |
| TS | Time Series |
| TS | Transient Survey |
| TSA | Timeseries Analysis |
| TSM | Test Statistics Map |
| TSR | Technical and Science Report |
| TTG | Telemetry Table GUI |
| UBVRI | U,B,V,R,I photometric system |
| UCSC | University of California at Santa Cruz |
| UGS | User Ground Segment |
| ULIRG | Ultraluminous Infrared Galaxy |
| UnID | Unidentified |
| UPS | Uninterruptible Power Supply |
| UCSC | University of California at Santa Cruz |
| UTC | Universal Time Coordinated |
| UV | Ultraviolet |
| UVOT | UltraViolet and Optical Telescope (Swift instrument) |
| UW | University of Washington |
| VDD | Version Description Document |
| VERITAS | Very Energetic Radiation Imaging Telescope Array System |
| VHE | Very High Energy |
| VI | Variability Index |
| VLA | Very Large Array |
| VLBA | Very Long Baseline Array |
| VLBI | Very Long Baseline Interferometry |
| VO, VOY | Virtual Observatory |
| VOE | Virtual Observatory Event |
| VP | Viewing Period |
| WAM | Web Application Manager |
| WAM | Weekly Analysis Meeting |
| WBD | Work Breakdown Description |
| WBS | Work Breakdown Structure |
| WCS | World Coordinate System |
| WD | White Dwarf |
| WEBT | Whole Earth Blazar Telescope |
| WG | Working Group |
| WIMP | Weakly Interacting Massive Particle |
| WIRED | World-Wide Web Interactive Remote Event Display (BaBar) |
| WMAP | Wilkinson Microwave Anisotropy Probe |
| WP | Working package (pacco di lavoro) |
| WR | Wolf-Rayet star |
| WS | Workshop |
| WSC | White Sands Complex |
| WWW | World Wide Web |
| XBL | X-ray Selected BL Lac Object |
| XLF | X-ray Luminosity Function |
| XML | eXtensible Markup Language |
| XMM | XMM-Newton, X-ray Multi-Mirror Mission |
| XRB | X-Ray Background |
| XRB | X-ray Binary |
| XRT | X-ray Telescope (Swift instrument) |
| XSPEC | X-ray spectral-fitting program |
| XTE | Rossi X-ray Timing Explorer |
| z | Symbol for redshift |
| ZA | Zenith Angle |
| ZP | Zero Point |