O & K Geissler GmbH
O 'Brien Frank L.
O"Byrne Daniel
O'Banion Michael
O'Fathaigh Barra
O'Boyle John M.
O'Brien Denis R.
O'Brien Frank L.
O'Brien Gerald A.
O'Connor James P.
O'Dell Danny W.
O'Dell Donald E.
O'Hara John
O'Keefe George F.
O'Loughlin Francis A.
O'Rourke William J.
O. M. S., Inc.
O.L.C.I. Engineering S.r.l.
O.M.S., Inc.
Oakland Engineering Inc.