WElectronic component
WCam timer
WCapacitor
WElectronic color code
WColor coding technology for visualization
WCommutator (electric)
WControl knob
WElectric bell
WElectric switchboard
WElectrical contacts
WFault indicator
WFeedthrough
WFuse (automotive)
WFuse (electrical)
WGas-filled tube
WInterrupter
WLead (electronics)
WElectric light
WMemistor
WMetal rectifier
WMicrocoil
WNon-radiative dielectric waveguide
WNorator
WNullator
WNullor
WOpto-isolator
WPositronic (company)
WPothead
WPressure-tolerant electronics
WResistive opto-isolator
WResistor
WSelenium rectifier
WSolaristor
WSurge arrester
WTerminal (electronics)
WThermopile
WTrancitor
WTransient voltage suppressor
WTransistor
WTrue DC
WVacuum tube
WVaristor
WVibrator (electronic)
WVoltage portal
WWaveguide
WZetatron