Sometimes PMO also means "Piss Me Off" or "Put Me On," and there are additional usages. PMO in business usually sticks with Project Management Office, which stands for a team within a company that monitors and manages projects. The great flexibility of PMO is also reflected in its various contexts. To be able to tell what someone means by PMO, you'll have to understand the context you're in. The context here gives you a clear distinction between meanings-casual or business-like.
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