OSS

OSS or Oss may refer to:

Places

O.S.S. (film), a 1946 World War II spy film about Office of Strategic Services agents
Oss (film), a 1976 Norwegian post-apocalyptic disaster film
O.S.S. (TV series), a British spy series which aired in 1957 in the UK and the US
Open Source Shakespeare, a non-commercial website with texts and statistics on Shakespeare's plays
Old Syriac Sinaiticus, a Bible manuscript
Organization of Super Spies, a fictional organization in the Spy Kids franchise

ÖSS (Öğrenci Seçme Sınavı), a former university entrance exam in Turkey
Options Secondary School, Chula Vista, California
Otto Stern School for Integrated Doctoral Education, Frankfurt am Main, Germany
Outram Secondary School, Singapore
Out-of-school suspension, a form of school discipline considered more severe than in-school suspension

Observatoire du Sahara et du Sahel, dedicated to fighting desertification and drought; based in Tunis, Tunisia
Office for Science and Society, Science Education from Montreal's McGill University
Office of Strategic Services, World War II forerunner of the Central Intelligence Agency
Office of the Supervising Scientist, an Australian Government body under the Supervising Scientist
One-stop shop, a government office where multiple services are offered in a centralized location rather than in different places
Open Spaces Society, a UK registered charity championing public paths and open spaces
Operations Support Squadron, a United States Air Force support squadron
Optimized Systems Software, a former software company

Ohio Sky Survey
Optical SteadyShot, a lens-based image stabilization system by Sony
Optimal Stereo Sound, another name for the Jecklin Disk recording technique
Oriented spindle stop, a type of spindle motion used within some G-code cycles
Ovary-sparing spay
Overspeed Sensor System, part of the Train Protection & Warning System for railroad trains

Operations support system, computers used by telecommunications service providers to administer and maintain network systems
Open Sound System, a standard interface for making and capturing sound in Unix operating systems
OpenSearchServer, search engine software
Open-source software, software with its source code made freely available
- GPT-OSS (stylized as gpt-oss), a set of open-weight reasoning models released by OpenAI on August 5, 2025