WAdafruit Industries
WAllied Electronics
WCD-R King
WConrad Electronic
WCPC (company)
WDick Smith (retailer)
WDigi-Key
WElectrocomponents
WElko Grupa
WFarnell element14
WFischer Connectors
WFuture Electronics
WMabuchi Motor
WMaplin (retailer)
WMouser Electronics
WNewark element14
WOctagon Computer Superstore
WRS Components
WSparkFun Electronics
WTTI, Inc.