O′Byrne Daniel
O'Bryne Daniel J.
O'Donnell Charles Leo
O'Dunlaing Eoin
O'Quinn Robert W.
O'Toole Herbert
O'Brien John L.
O'Brien Patrick William
O'Connell Barry S.
O'Connell Patrick M.
O'Connell Ronald B.
O'Conner James F.
O'Connor John Vincent
O'Dell Gregory S.
O'Donnell Paul E.
O'Donoghue Joseph
O'Hagan Brian R.
O'Malley Michael P.
O. G. Hoyer A/S
O.M.V. S.p.A. (Officine Meccaniche Veronesi)