Harold D. (Howdy) Koontz (May 19, 1909 – February 11, 1984) was an American organizational theorist, professor of business management at the University of California, Los Angeles and a consultant for many of America's largest business organizations. Koontz co-authored the book ''Principles of Management'' with Cyril J. O'Donnell; the book has sold around two million copies and has been translated into 15 languages.
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