OIS may refer to:
Computing Object Oriented Input System, a cross-platform input system Objective Interface Systems, a communications software and hardware company Optical IP Switching, a computer optical network architecture Optical image stabilization, a technique to reduce motion-related blurring by an imaging system
Education Oxford International School (Panama), an international school in Panama City, Panama Oeiras International School, an international school in Oeiras (suburb of Lisbon), Portugal Oulu International School, an international school in Oulu, Finland Organised Independents (OIs), an interest group within the National Union of Students (UK) Oberoi International School, an international school in Mumbai, India Oslo International School, an international school in Oslo, Norway Orchlon school(Orchlon International School), an international school in Ulaanbaatar, Mongolia
Other science related Ops in Surgery, The St George's Surgical Society, an academic society at St George's University Oncogene-Induced Senescence, a mechanism in cell biology Ocular ischemic syndrome, a medical condition which blocks arterial blood flow to the eye Oxygen isotope stages, alternating warm and cool periods in the Earth's paleoclimate Outbreak intensity score, a scale to rank tornado outbreaks
Other Officer-involved shooting, an incident in which a police officer shoots at another person Örgryte IS, a Swedish sports club based in Gothenburg Overnight indexed swap, a type of interest rate swap Order of Ikhamanga, a South African cultural honour