Optech Inc.
Optectron Industries
Optimus Services AG
Optosupply Electronics (Shenzhen) Limited
Oram John A.
Orban Janos
Orellana William
Orosz Edward G.
Orr Allie E.
Ossenmacher John M.
Osteen Mitchell M.
Ostermann Georg C.
Ostermann Apparatebau Kiel GmbH
Oswald Willi Wolfgang
Otani Haruo
Owen Keith J.
Owen Keith James