OIS

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

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