Waferscale Intergration
     Wago
     Waldom Electronics
     Wall Industries
     Warner Electric
     Watkins Johnson
     Wavetek
     Wearness Hollingsworth
     Weco
     Weco
     Weidmuller
     Wells electronics
     Welwyn
     Westcoast Magnetics
     Westcode
     Western Digital
     White Rogers / Stancor
     Wickman
     Wickmann
     Wieland
     Wieson
     William Hughes
     Wima
     Winbond
     Winchester
     Winpoint
     Winslow
     Wire Pro
     Wirepro
     Woertz
     World Products
     WPI
     Wustlich