Oldsmobile - GENERAL MOTORS CORP., and UNITED MOTORS SERVICE

Olympia - CROSLEY RADIO CORP.

Operadio - OPERADIO MFG. CO.,

Oracle - CROSLEY RADIO CORP.

Oriole - CONTINENTAL RADIO & TELEV.

Orpheus - SILVER, McMURDO, INC.

Ozarka (original), Viking - OZARKA RADIO CORP.

Ozarka (present) - VIKING RADIO, and RADOLEK CO.