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- Oaklands University, United Kingdom. May be "a new version of the University Degree Program."
- Oikos University, Oakland, California. Described by the Chronicle of Higher Education, as "a little-known, unaccredited institution housed in a single building in an East Oakland office park."
- Ohio Christian College
- Open International University, Nigeria
- Oregon College of Ministry, Gresham, Oregon (Oregon’s Office of Degree Authorization lists this institution as unaccredited religious exempt school)
Read more about this topic: List Of Unaccredited Institutions Of Higher Education