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Osa or OSA may refer to:

Places

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Military

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Science and technology

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Medicine

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  • Obstructive sleep apnea, a sleep-related breathing disorder wherein episodes of upper airway obstruction lead to reduced breathing that interrupts normal sleep
  • Osteosarcoma, a malignant neoplasm of bone

Computing

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Businesses and organizations

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People

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Other uses

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See also

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