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This document employs several abbreviations and acronyms to refer concisely to an item, after it has been introduced. The following list is aimed to help the reader in recalling the extended meaning of each short expression:
% List of acronyms included, based on PDR documentation package. Most of the abbreviations used in
% the PDR document package are included, as well as from ESO's Common Definition and Acronyms
% document (ESO-193178v6, 09-07-2013).
% There are several acronyms that have multiple meanings. Uncomment/Comment the one that you need.
% For an acronym inside another acronym, e.g. MICADO = Multi-AO ..., use
% \acro{MICADO}{Multi-\acs{AO} ...} and label the definition of AO using
% \acro{AO}{Adaptive Optics}\label{acro:AO}.
% Otherwise, warnings are raised.
\begin{acronym}[MICADO123]
% A
\acro{ACS}{ALMA Common Software}
\acro{ACU}{Astrometric Calibration Unit}
\acro{AD}{Applicable Documents}
\acro{ADC}{Atmospheric Dispersion Corrector}
%\acro{ADC}{Analog to Digital Converter}
\acro{ADI}{Angular Differential Imaging}
\acro{ADP}{Acceptance Data Package}
\acro{ADU}{Analog-to-Digital Unit}
\acro{AFM}{Active Folding Mirror}
\acro{AHU}{Air Handling Unit}
\acro{A-IMA}{Astrometric Imaging}
\acro{AIV}{Assembly, Integration, Verification}
\acro{AIT}{Assembly, Integration, Tests}
\acro{AKF}{Auto-collimation Telescope}
\acro{ALMA}{Atacama Large Millimeter Array}
\acro{ALT}{Altitude}
\acro{AMSL}{Above Mean Sea Level}
\acro{ANF}{Antofagasta}
\acro{AO}{Adaptive Optics}\label{acro:AO}
\acro{AOB}{Any Other Business}
\acro{AOWFC}{Adaptive Optics Wavefront-sensor Camera}
\acro{APE}{Active Phasing Experiment}
\acro{API}{Application Programming Interface}
\acro{AR}{Anti Reflection}
\acro{ARU}{Adaptive Relay Unit}
\acro{ASM}{Astronomical Site Monitor}
%\acro{ASM}{APE Segmented Mirror}
\acro{ASL}{Above Sea Level}
\acro{AT}{Alignment Telescope}
%\acro{AT}{Acceptance Test}
\acro{AWG}{Astrometry Working Group}
\acro{AZ}{Azimuth}
% B
% \acro{BB}{Blackbody}
\acro{BB}{Broad-band (filter}
\acro{BMS}{Building Management System}
\acro{BOM}{Bill of Materials}
% C
\acro{CA}{Cryostat Assembly}
\acro{CAD}{Computer Aided Design}
\acro{CAE}{Computer Aided Engineering}
% \acro{CAM}{Camera optics}
\acro{CAM}{Cold Astrometric Mask}
\acro{CBS}{Cost Breakdown Structure}
\acro{CCB}{Configuration Control Board}
% \acro{CCB}{Change Control Board}
\acro{CCD}{Charge Coupled Device}
\acro{CCS}{Central Control System}
\acro{CDR}{Critical Design Review}
\acro{CDRL}{Contract Data Requirements List}
\acro{CDS}{Correlated Double Sampling}
\acro{CFD}{Computational Fluid Dynamics}
\acro{CFP}{Call for Proposals}
\acro{CFT}{Call for Tender}
\acro{CI}{Configuration Item}
\acro{CIDL}{Configuration Item Data List}
\acro{CIL}{Critical Item List}
\acro{C-IMA}{Coronagraphic Imaging}
\acro{CIR}{Central Intensity Ratio}
\acro{CM}{Configuration Management}
\acro{CLC}{Clasical Lyot Coronograph}
\acro{CLIP}{C Library for Image Processing}
\acro{CMMS}{Computerized Maintenance Management System}
\acro{CMP}{Chemical Mechanical Polishing}
\acro{CMS}{Cabinet Management System}
\acro{COG}{Center of Gravity}
\acro{COI}{Cold Optics Instrument}
\acro{COL}{Collimator}
\acro{COLR}{Collimator Reference Plate}
\acro{Co-Pi}{Co-Principal Investigator}
\acro{COS}{Coordinate System}
\acro{COTS}{Component Of The Shelf}
\acro{CPL}{Common Pipeline Library}
\acro{CPU}{Central Processing Unit}
\acro{CQC}{Complete Quadratic mode Combination}
\acro{CRB}{Change Request Board}
\acro{CRDL}{Contract Requirement Data List}
\acro{CRE}{Change Request}
\acro{CS}{Coordinate System}
\acro{CTE}{Coefficient of Thermal Expansion}
\acro{CVD}{Chemical Vapor Deposition}
\acro{CVI}{Chemical Vapor Infiltration}
\acro{CWM}{Central Wheel Mechanism}
% D
\acro{DB}{Database}
\acro{DBCM}{Database Content Management}
\acro{DCL}{Declared Component List}
\acro{DCS}{Detector Control System}
\acro{DD}{Deliverable Document}
\acro{DDF}{Design Definition File}
\acro{DEC}{Declination}
\acro{DFS}{Data Flow Subsystem}
\acro{DICB}{Data Interface Control Board}
\acro{DID}{Data Item Description}
\acro{DIMM}{Differential Image Motion Monitor}
\acro{DIN}{Deutsche Industrie Norm}
\acro{DIPSI}{Diffraction Image Phase Sensing Instrument}
\acro{DIT}{Detector Integration Time}
\acro{DJF}{Design Justification File}
\acro{DLR}{Damage Limitation Requirement}
\acro{DM}{Deformable Mirror}
\acro{DMPPL}{Declared Materials, Parts and Process List}
\acro{DOF}{Degrees Of Freedom}
\acro{DPS}{Data Processing Subsystem}
% \acro{DPS}{Detector Positioning System}
\acro{DRB}{Data Reduction Block}
\acro{DRD}{Document Requirements Definition}
\acro{DR}{De-Rotator}
\acro{DRLS}{Data Reduction Library Specification document}
\acro{DRS}{Data Reduction System}
% E
\acro{EC}{European Commission}
\acro{ECSS}{European Cooperation for Space Standardization}
\acro{EEE}{Electrical Electornic \& Electromechanical components}
\acro{EELT}{European Extremely Large Telescope}
\acro{E-ELT}{European Extremely Large Telescope}
\acro{EH}{Entrance Hall}
\acro{ELGS}{\acs{ELT} Laser Guide Star}
\acro{ELT}{Extremely Large Telescope}\label{acro:ELT}
\acro{ELT DS}{\acs{ELT} Design Study}
\acro{EMC}{Electromagnetic Compatibility}
\acro{EN}{Euro Norm}
\acro{ENC}{Enclosure}
\acro{EPICS}{Exo-Planets Imaging Camera and Spectrograph}
\acro{ERA}{European Research Area}
\acro{ES}{Edge Sensor}
\acro{ESE}{\acs{ELT} Science \& Engineering (committee)}
\acro{ESFRI}{European Strategy Forum on Research Infrastructures}
\acro{ESI}{Edge Sensor Interface}
\acro{ESO}{European Southern Observatory}
\acro{ETC}{Exposure Time Calculator}
\acro{ETP}{\acs{ELT} Telescope Project Office}
\acro{EUV}{Extreme Ultraviolet}
\acro{EXW}{EX Works}
% F
\acro{FCA}{Free Carrier}
\acro{FCB}{Friction Characterization Breadboard}
\acro{FCU}{Flat field and spectral Calibration Unit}
\acro{FCS}{Function Control Software}
\acro{FDIR}{Failure Detection, Isolation and Recovery}
\acro{FDR}{Final Design Review}
\acro{FE}{Finite Element}
\acro{FEA}{Finite Element Analysis}
\acro{FEED}{Front End Engineering Design}
\acro{FEM}{Finite Element Model}
\acro{FFT}{Fast Fourier Transform}
\acro{FITS}{Flexible Image Transport System}
\acro{FLI}{Fractional Lunar Illumination}
\acro{FMEA}{Failure Mode and Effect Analyses}
\acro{FMECA}{Failure Mode Effect and Criticality Analysis}
\acro{FOB}{Free On Board}
\acro{FOV}{Field Of View}
\acro{FP}{Focal Plane}
\acro{FPGA}{Field Programmable Gate Array}
\acro{FPA}{Focal Plane Array}
\acro{FPM}{Focal Plane Mechanism}
\acro{FPn}{European Commission's Framework Programme n (n=1, 2, ...).}
\acro{FPP}{Focal Plane Mosaic}
\acro{FRACAS}{Failure Reporting, Analysis and Corrective Action System}
\acro{FTA}{Failure Tree Analysis}
\acro{FTE}{Full Time Equivalent (year)}
\acro{FTS}{Fourier Transform Spectrograph}
\acro{FW}{Firmware}
\acro{FWC}{Full Well Capactiy}
\acro{FWM}{Filter Wheel Mechanism}
\acro{FWHM}{Full Width at Half Maximum}
% G
% \acro{GCS}{General Command Set}
\acro{GCS}{Global Coordinate System}
\acro{GD}{Green Donut}
\acro{GDS}{Green Donut Support structure}
\acro{GI}{Gravity Invariant}
\acro{GLAO}{Ground Layer Adaptive Optics}
\acro{GMT}{Giant Magellan Telescope}
\acro{GMT}{Greenwich Meridian Time}
\acro{GSE}{Global Support Equipment}
\acro{GTO}{Guaranteed Time Observations}
\acro{GUI}{Graphical User Interface}
\acro{GUID}{Globally Unique Identifier}
% H
\acro{HB}{Hydrostatic Bearings}
\acro{HCI}{High Contrast Imaging}
\acro{HDRL}{High-level Data Reduction Library}
\acro{HDU}{Header-Data Unit}
\acro{HMI}{Human Machine Interface}
\acro{HRI}{High Resolution Imager}
\acro{HRTC}{Hard Real Time Computer}
\acro{HTRA}{High Time Resolution Astrophysics}
\acro{HVAC}{Heating, Ventilation and Air Conditioning}
\acro{HW}{Hardware}
% I
\acro{IAA}{Instrument Assembly Area}
\acro{IAC}{Instituto de Astrofísica de Canarias}
\acro{IAS}{Internal Alignment System}
\acro{ICD}{Interface Control Document}
\acro{ICS}{Instrument Control System}
\acro{ICT}{Information and Communications Technology}
\acro{I/F}{Interface}
\acro{IF}{Interface}
\acro{IFU}{Integral Field Unit}
\acro{ILS}{Interlock System}
% \acro{ILS}{Integrated Logistics and Support}
\acro{IM}{Integrated Model}
% \acro{IM}{Integrated Modeling}
% \acro{IM}{Interaction Matrix}
\acro{IMF}{Intermediate Focus}
\acro{INS}{Instrumentation Software}
\acro{INT}{Isaac Newton Telescope}
\acro{IR}{Infrared}
\acro{IRM}{Integration Readiness Meeting}
\acro{IS}{Integrating Sphere}
\acro{ISDD}{Instrument Software Design Description}
\acro{ISFS}{Instrument Software Functional Specification}
\acro{ISO}{International Standards Organisation}
\acro{Iss.}{Issue (number)}
\acro{ISURS}{Instrument Software User Requirement Specification}
\acro{IT}{Information Technology}
\acro{IVV}{In Vino Veritas}
\acro{IWA}{Inner Working Angle}
% J
\acro{JWST}{James Webb Space Telescope}
% K
\acro{KIP}{Key Inspection Point}
\acro{KM}{Key Milestone}
\acro{KOM}{Kick-Off Meeting}
% L
\acro{LADA}{\acs{LGS} Adapter nasmyth A focus}
\acro{LADB}{\acs{LGS} Adapter nasmyth B focus}
\acro{LADC}{Longitudinal Atmospheric Dispersion Corrector}
\acro{LAN}{Local Area Network}
\acro{LCS}{Local Coordinate System}
% \acro{LCS}{Local Control System}
\acro{LCU}{Local Control Unit}
\acro{LESIA}{Laboratoire d'Etudes Spatiales et Instrumentations pour l'Astrophysique}
\acro{LEMP}{Lightning Electromagnetic Pulse}
\acro{LGS}{Laser Guide Star}\label{acro:LGS}
\acro{LGSF}{Laser Guide Star Facility}
\acro{LGSU}{Laser Guide Star(s) Unit}
\acro{LOR}{Low Order Reference \acs{WFS}}
\acro{LoS}{Line of Sight}
\acro{LPS}{Lightning Protection System}
% \acro{LPS}{Laser Projection Subunit}
\acro{LRU}{Line Replaceable Unit}
\acro{LSU}{Local Safety Unit}
\acro{LSV}{Local Supervisor}
\acro{LTAO}{Laser Tomography Adaptive Optics}
\acro{LRI}{Low Resolution Imager}
\acro{LRU}{Line Replacement Unit}
\acro{LUT}{Look Up Table}
% M
\acro{M1}{Primary mirror}
\acro{M2}{Secondary mirror}
\acro{M3}{Tertiary mirror}
\acro{M4}{Quaternary mirror}
\acro{M5}{Fifth mirror}
\acro{M6}{Sixth mirror}
\acro{M6C}{Sixth mirror, folding the beams towards the coud\'e focus}
\acro{M6G}{Sixth mirror, folding the beams towards the gravity-invariant focus}
\acro{M6N}{Sixth mirror, folding the beams towards the lateral (bent) Nasmyth foci}
\acro{MandM}[M\&M]{\acs{MAORY} and \acs{MICADO} configuration}
\acro{MAIT}{Manufacture, Assembly, Integration, Test}
\acro{MAN}{Manual}
\acro{MAORY}{Multi-conjugate Adaptive Optics RelaY for the \acs{ELT}}\label{acro:MAORY}
\acro{mas}{milli arcsecond}
\acro{MASS}{Multi-Aperture Scintillation Sensor}
\acro{MBS}{Main Bench Structure}
\acro{MCA}{\acs{MICADO} Calibration Assembly}\label{acro:MCA}
\acro{MCAO}{Multi Conjugate Adaptive Optics}
\acro{MCD}{\acs{MICADO}}
\acro{MCU}{Movable source Calibration Unit}
% \acro{MCU}{Micro-Controller Unit}
\acro{MDU}{\acs{MCA} Deployment Unit}
\acro{MHE}{Mechanical Handling Equipment}
\acro{MICADO}{Multi-\acs{AO} Imaging CamerA for Deep Observations}\label{acro:MICADO}
\acro{MIMO}{Mulitple Input Multiple Output}
\acro{MIP}{Mandatory Inspection Point}
\acro{MLE}{Maximum Likely Earthquake}
\acro{MMA}{\acs{MICADO} \& \acs{MAORY} Astrometry}
\acro{MMB}{Mechanical Maintenance Building}
\acro{MMPP}{Materials, Mechanical Parts and Processes}
\acro{MOAO}{Multi Object Adaptive Optics}
\acro{MPE}{Max-Planck-Institut für extraterrestrische Physik}
\acro{MPIA}{Max-Planck-Institut für Astronomie}
\acro{MRB}{Material Review Board}
\acro{MRF}{Magneto Rheological Finishing}
\acro{MS}{Maintenance software}
\acro{MSE}{Mechanical Support Equipment}
\acro{MSM}{Main Selection Mechanism}
\acro{MTBCF}{Mean Time Between Critical Failures}
\acro{MTBF}{Mean Time Between Failure}
\acro{MTF}{Modulation Transfer Function}
\acro{MTTF}{Mean Time To Failure}
\acro{MTTR}{Mean Time To Repair}
% N
\acro{N/A}{Not Applicable}
\acro{NA}{Numerical Aperture}
\acro{NB}{Narrow-band (filter)}
\acro{NADA}{\acs{NGS} Adapter nasmyth A focus}
\acro{NADB}{\acs{NGS} Adapter nasmyth B focus}
\acro{NADC}{\acs{NGS} Adapter nasmyth C focus}
% \acro{NADC}{\acs{NGS} Adapter Coud\'e focus}
\acro{NADG}{\acs{NGS} Adapter nasmyth G focus}
\acro{NADA}{\acs{NGS} Adapter invariant Gravity focus}
\acro{NC}{Non-Compliant, Non-Compliance}
\acro{NCPA}{Non Common Path Aberration}
\acro{NCR}{Non-Conformance Report}
% \acro{NCR}{No Collapse Requirement}
\acro{ND}{Neutral Density}
\acro{NDA}{Non-Disclosure Agreement}
\acro{NGC}{New Generation Detector Controller}
\acro{NGS}{Natural Guide Star}\label{acro:NGS}
\acro{NIR}{Near Infrared}
\acro{NOVA}{Nederlandse Onderzoekschool voor Astronomie}
% O
\acro{OAPD}{Osservatorio Astronomico di Padova}
\acro{OB}{Observation Block}
\acro{OBE}{Operating Basis Earthquake}
\acro{OBS}{Organisational Breakdown Structure}
\acro{OCD}{Operational Concept Description}
\acro{OCS}{Observation Coordination Software}
\acro{OD}{Optical Density}
\acro{OLDB}{Online Database}
\acro{OoM}{Order of Magnitude}
\acro{OpcUA}{OPC Unified Architecture}
\acro{OPD}{Optical Path Difference}
\acro{OPL}{Optical Path Length}
\acro{ORM}{Observatorio Roque de los Muchachos (Canary Islands, Spain)}
\acro{OSE}{Optical Support Equipment}
\acro{OSS}{Observer Support Software}
\acro{OWL}{Overwhelmingly Large telescope}
% P
\acro{P2PP}{Phase 2 Proposal Preparation}
\acro{PA}{Product Assurance}
\acro{PAC}{Preliminary Acceptance in Chile}
\acro{PACT}{Position Actuator}
\acro{PAE}{Preliminary Acceptance in Europe}
\acro{PAL}{Part List}
\acro{PAO}{Preliminary Acceptance at the Observatory}
\acro{PA/QE}{Product Assurance / Quality Assurance}
\acro{PAP}{Product Assurance Plan}
\acro{PCA}{Principal Component Analysis}
\acro{PDM}{Product Data Managment}
\acro{PDR}{Preliminary Design Review}
\acro{PFS}{Pre-Focal Station}
\acro{PGA}{Peak ground Acceleration}
\acro{PHA}{Preliminary Hazard Analysis}
\acro{PI}{Principal Investigator}
\acro{PIM}{Pupil Imager}
\acro{PLC}{Programmable Logic Controller}
\acro{PMP}{Project Management Plan}
\acro{PO}{Project Office}
\acro{POA}{Paranal Or Armazones}
\acro{ppFPA}{Partially Populated Focal Plane Array}
\acro{PreCADO}{Observations Preparation Software System}
\acro{PRR}{Preliminary Requirements Review}
\acro{PS}{Plate Scale}
\acro{PSD}{Power Spectral Density}
\acro{PSF}{Point Spread Function}\label{acro:PSF}
\acro{PSF-R}{\acs{PSF} Reconstruction}
\acro{PSI}{Pound per Square Inch}
% \acro{PSI}{Point Source Interferometer}
\acro{PSS}{Point Source Sensitivity}
\acro{PSSn}{Point Source Sensitivity, normalized}
\acro{PTP}{Precision Time Protocol}
\acro{PTV}{Peak To Valley}
\acro{PV}{Peak to Valley}
\acro{PVA}{Provisional Acceptance}
\acro{PVD}{Phase Vapor Deposition}
\acro{PWFS}{Pyramid Wavefront Sensor}
\acro{PWM}{Pupil Wheel Mechanism}
\acro{PYPS}{Pyramid Phasing Sensor}
% Q
\acro{QA}{Quality Assurance}
\acro{QC}{Quality Control}
\acro{QE}{Quantum Efficiency}
\acro{QoS}{Quality of Service}
\acro{Qty}{Quantity}
% R
\acro{RA}{Right Ascension}
\acro{RAM}{Reliability, Availability, Maintainability}
\acro{RAMS}{Reliability, Availability, Maintainability, Safety}
\acro{RCA}{Root Cause Analysis}
\acro{RandD}[R\&D]{Research \& Development}
\acro{RD}{Reference Documents}
\acro{RFP}{Request For Proposal}
\acro{RFW}{Request For Waiver}
\acro{RIC}{Review Item Comment}
\acro{RID}{Review Item Discrepancy}
\acro{RIQ}{Review Item Question}
\acro{RM}{Remote Mode}
\acro{RMS}{Root Mean Square}
\acro{RO}{Relay Optic}
\acro{RON}{Read Out Noise}
\acro{RPC}{Remote Procedure Call}
\acro{RRM}{Rapid Response Module}
\acro{RRR}{Read-Reset-Read}
\acro{RSS}{Root Sum Square}
\acro{RTC}{Real Time Computer}
\acro{RTD}{Real Time Display}
% S
\acro{SA}{Support Astronomer}
\acro{SACOS}{Segment Active Optics Sensor}
\acro{SAF}{Science Archive Facility}
\acro{SAM}{Sparse Aperture Mask}
\acro{SCAO}{Single Conjugate Adaptive Optics}\label{acro:SCAO}
\acro{SCIDAR}{Scintillation Detection And Ranging}\label{acro:SCIDAR}
\acro{SCL}{Santiago de Chile}
\acro{SCP}{Service Connection Point}
\acro{SCU}{\acs{SCAO} Calibration Unit}
\acro{SE}{System Engineering}
\acro{SED}{Spectral Energy Distribution}
\acro{SFP}{Scientific Focal Plane}
\acro{SFS}{Segment Figure Sensor}
\acro{SHAPS}{Shack-Hartmann Phasing Sensor}
\acro{SiC}{Silicon Carbide}
\acro{S-IMA}{Standard Imaging}
\acro{SimCADO}{Instrument Data Simulator for \acs{MICADO}}
\acro{SISO}{Single Input Single Output}
\acro{SLODAR}{Slope Detection And Ranging}
\acro{SM}{Service Mode}
\acro{SNR}{Signal to Noise Ratio}
\acro{SOO}{Statement Of Objectives}
\acro{SOW}{Statement Of Work}
\acro{SPD}{Surge Protective Mode}
\acro{SPE}{Spectroscopy}
% \acro{SPE}{Specification}
\acro{SPF}{Single Point Failure}
\acro{SR}{Strehl Ratio}
\acro{SRD}{System Requirements Document}
\acro{SRTC}{Soft Real Time Computer}
\acro{SRU}{Shop Replaceable Unit}
\acro{SSO}{Solar System Object}
\acro{SSS}{Single Star \acs{SCIDAR}}
\acro{ST}{Support Structure}
\acro{SUP}{Supervisor}
\acro{SV}{Science Verification}
\acro{SW}{Software}
\acro{SWPA}{Software Product Assurance}
% T
\acro{T-AWG}{Taskforce Astrometry Working Group}
\acro{TACOS}{Telescope Active Optics Sensor}
\acro{TBC}{To Be Confirmed}
\acro{TBD}{To Be Determined}
\acro{TBW}{To Be Written}
\acro{TCS}{Telescope Control System}
\acro{TDCS}{(Technical) Detector Control Software}
\acro{TDP}{Technical Data Package}
\acro{THD}{Total Harmonic Distortion}
\acro{TIO}{Telescope and Instrument Operator}
\acro{TLI}{Threshold Limited Integration}
\acro{TLR}{Top Level Requirements}
\acro{TMA}{Three Mirror Anastigmat}
\acro{TMT}{Thirty Meter Telescope}
\acro{TN}{Technical Note}
\acro{TOO}{Target Of Opportunity}
\acro{TRE}{Technology Readiness Level}
\acro{TRL}{Technology Readiness Level}
\acro{TRM}{Test Readiness Meeting}
\acro{TRS}{Time Reference System}
\acro{TS}{Technical Specification}
\acro{TSS}{Top Support Structure}
\acro{TT}{Tip-Tilt}
% U
\acro{UKA}{\acs{UKATC}}
\acro{UKATC}{United Kingdom Astronomical Technology Centre}\label{acro:UKATC}
\acro{UPS}{Uninterruptible Power Supply}
\acro{URD}{User Requirements Document}
\acro{USM}{Universitäts-Sternwarte München}
\acro{USP}{User defined Polarizing Surface}
% \acro{UT}{Universal Time}
\acro{UT}{Unit Telescope}
\acro{UTC}{Coordinated Universal Time}
\acro{UV}{Ultraviolet}
\acro{vAPP}{Vector Apodizing Phase Plate}
% V
\acro{VCD}{Verification Control Document}
\acro{ver.}{version}
\acro{VIS}{Visible light}
\acro{VLT}{Very Large Telescope}
\acro{VLTI}{Very Large Telescope Interferometer}
\acro{VM}{Virtual Machine}
% \acro{VM}{Visitor Mode}
\acro{VO}{Virtual Observatory}
\acro{vs.}{versus}
\acro{VV}[V\&V]{Validation and Verification}
\acro{VVC}{Vector Vortex Coronagraph}
% W
\acro{WAM}{Warm Astrometric Mask}
\acro{WBS}{Work Breakdown Structure}
\acro{WEB}{Wind Evaluation Experiment}
\acro{WF}{Wavefront}
\acro{WFC}{Wavefront Control}
\acro{WFE}{Wavefront Error}
\acro{WFS}{Wave Front Sensor}\label{acro:WFS}
\acro{WFRTC}{Wavefront Real Time Computer}\label{acro:WFRTC}
\acro{WH}{Warping Harness}
\acro{WHT}{William Herschel Telescope}
\acro{WP}{Work Package}
\acro{WPD}{Work Package Definition}
\acro{w.r.t.}{with respect to}
% X
\acro{X4}{MPE integration hall}
\acro{XAO}{Extreme Adaptive Optics}
% Y
% Z
\acro{ZEUS}{Zernike Unit (segment phasing) Sensor}
\end{acronym}