WAlpha Magnetic Spectrometer
WAndrogynous Peripheral Attach System
WAxiom Orbital Segment
WBigelow Expandable Activity Module
WCentrifuge Accommodations Module
WColumbus (ISS module)
WCommon Berthing Mechanism
WCupola (ISS module)
WDestiny (ISS module)
WDextre
WElectrical system of the International Space Station
WEuropean Robotic Arm
WExPRESS Logistics Carrier
WExternal Active Thermal Control System
WExternal stowage platform
WGrapple fixture
WHabitation Module
WHarmony (ISS module)
WIntegrated cargo carrier
WIntegrated Truss Structure
WInterim Control Module
WInternational Docking Adapter
WInternational Standard Payload Rack
WISS ECLSS
WISS Propulsion Module
WISS-RapidScat
WKibō (ISS module)
WLeonardo (ISS module)
WMobile Servicing System
WNanoracks Bishop Airlock
WNeutron Star Interior Composition Explorer
WNode 4
WOrbital replacement unit
WPressurized Mating Adapter
WQuest Joint Airlock
WSpace Station Processing Facility
WTranquility (ISS module)
WUnity (ISS module)
WUS Orbital Segment