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Miami Conservancy District (Ohio)
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Michelin prize flight
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Military bases
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Miller, Ivonette Wright, 1896-1995
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Miller, William V.
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Mills, Lois
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Mitchell, William, 1879-1936
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Moedebeck, Hermann W. L. (Hermann Wilhelm Ludwig), 1857-1910
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Montgomery County Historical Society (Ohio)
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Monuments
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Morrow, John
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National Aeronautic Association (U.S.)
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National Aeronautics and Space Administration (NASA)
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National Cash Register Company
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National historic landmarks--United States
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NCR Corporation
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Northcliffe, Alfred Harmsworth, Viscount, 1865-1922
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Oberlin College
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Oldsmobile automobile
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Oliver, Mary
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