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 Whisper Systems, a nonprofit open-source software group
- Open Window School, a private school located in Seattle, Washington
- 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
|This disambiguation page lists articles associated with the title OWS.
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