OIS

OIS may mean:

• Overnight indexed swap, a type of interest rate swap
• Object Oriented Input System, a cross-platform input system
• Optical IP Switching, a computer optical network architecture
• Optical Image Stabilization, a technique to stabilize the image in digital cameras and camcorders in order to increase picture quality
• Ocular ischemic syndrome, a medical condition which blocks arterial blood flow to the eye
• Oxygen isotope stages of the Weichselian glaciation used in paleoclimatology
• Objective Interface Systems, a communications software and hardware company
• Oeiras International School, an international school in Oeiras (suburb of Lisbon), Portugal
• Oxford International School, an international English-medium school in Dhaka, Bangladesh
• Oulu International School, a small public not-for-profit international school in Oulu, Finland
• Ops in Surgery, The St George's Surgical Society, a society at St George's University
• Örgryte IS, a Swedish sports club based in Gothenburg

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