OU or Ou or ou may stand for:
Outlook.com is a web-based suite of webmail, contacts, tasks, and calendaring services from Microsoft.
In business, outsourcing is an agreement in which one company contracts its own internal activity to different company.
An outlaw motorcycle club is a motorcycle subculture that has its roots in the immediate post-World War II era of American society.
The Outer Hebrides (), also known as the Western Isles (Scottish Gaelic: Na h-Eileanan Siar [nə ˈhelanən ˈʃiəɾ] or Na h-Eileanan an Iar [nəˈhelanən əˈɲiəɾ]), Innse Gall ("islands of the strangers") or the Long Isle or the Long Island (Scottish Gaelic: An t-Eilean Fada), is an island chain off the west coast of mainland Scotland.
The following outline is provided as an overview of and topical guide to geography:
Outlander is a British-American television drama series based on the historical time travel Outlander series of novels by Diana Gabaldon.
Our Gang (later known as The Little Rascals or Hal Roach's Rascals) are a series of American comedy short films about a group of poor neighborhood children and their adventures.