OWS may refer to Occupy Wall Street, a political protest starting in 2011 that originated in New York City at Zucotti Park OGC Web Service Common, a standard of the Open Geospatial Consortium Oil–water separator, a device to separate oil and water Oily water separator, shipboard equipment Open water swimming, outdoor swimming in open lakes, rivers, and oceans Open Whisper Systems, a nonprofit open-source software group Open Window School, a private school located in Bellevue, Washington Operation Warp Speed, the United States national program to accelerate the development, manufacturing, and distribution of COVID-19 vaccines, therapeutics, and diagnostics. Opioid Withdrawal Syndrome Optional White Space (computer science), sometimes used when defining a grammar or protocol specification, see Metasyntax Order of World Scouts, the first international Scouting organisation Oritsé Williams, former member of JLS Overhead Weapon Station, a remote weapon station