All articles starting with O
9,097 articles
Open Season: Call of Nature
Open Season: Call of Nature is a 2023 2D animated comedy series by 9 Story Media Group and Brown Bag Films Toronto, based on Sony Pictures Animation's Open Season films, following Boog and Elliot running Camp Wild across 52 eleven-minute episodes.
Open Semantic Interchange
Open Semantic Interchange (OSI), now Apache Ossie (incubating), is a vendor-neutral, YAML/JSON open specification launched by Snowflake, Salesforce, dbt Labs, and RelationalAI in September 2025 for exchanging semantic model metadata, metrics, dimensions, and relationships across BI, analytics, and AI tools.
Open set
An open set is a subset of a topological space declared open by the topology, generalizing a region where every point has room around it.
Open Shortest Path First
Open Shortest Path First (OSPF) is a link-state interior gateway protocol, specified in RFC 2328 in 1998, that routes IP traffic within a single autonomous system using Dijkstra's algorithm.
Open skies agreement
An open skies agreement is a bilateral or multilateral air services agreement removing most government control over international air transport, letting airlines decide routes, capacity, and fares.
Open Society Foundations
The Open Society Foundations (OSF), founded by George Soros in 1979 with a first foundation in Hungary in 1984, are the world's largest private funder of rights and justice groups, with over $32 billion given and $24 billion in expenditures, now chaired by Alex Soros.
Open source
Open source is software whose distribution terms allow anyone to use, study, modify, and redistribute the code; the Open Source Initiative's ten-criterion definition has governed the term since 1998.
Open Source AI Definition (OSI)
The Open Source AI Definition (OSAID) is a standard by the Open Source Initiative specifying what AI systems must disclose to be called open source.
Open Source Definition
The Open Source Definition (OSD) is a set of ten license criteria maintained by the Open Source Initiative, derived from the Debian Free Software Guidelines in 1998.
Open Source Development Labs
Open Source Development Labs was a nonprofit consortium founded in 2000 to support Linux, employing Linus Torvalds until it merged into the Linux Foundation in 2007.
Open Source Geospatial Foundation
The Open Source Geospatial Foundation (OSGeo) is a Delaware nonprofit founded in 2006 to support and promote free and open-source geospatial software, including QGIS, GDAL, and PostGIS.
Open Source Initiative
The Open Source Initiative (OSI), founded by Eric Raymond and Bruce Perens in 1998, is a nonprofit that maintains the Open Source Definition and approves open source licenses.
Open Source Leg
The Open Source Leg (OSL) is an open-source robotic knee–ankle prosthesis developed at the University of Michigan to give researchers a standardized, low-cost hardware platform for testing control strategies.
Open Source Physics
Open Source Physics is a project offering free, open-source computer-based resources for teaching physics and computation, including Java and JavaScript simulations, the Tracker video analysis tool, and textbooks.
Open standard
An open standard, also called an open specification, is a technical standard developed and licensed so that anyone can implement it, though definitions differ between governments and standards bodies.
Open Student Television Network
Open Student Television Network (OSTN), launched 2005 by CampusEAI Consortium with Internet2, was a Cleveland-based IP television service carrying student-produced and licensed educational programming to universities over research networks in 36 countries.
Open system (systems theory)
An open system is a system that exchanges energy, matter, and information with its environment; Ludwig von Bertalanffy introduced the concept in biology in a 1950 Science paper.
Open table format
Open table formats (Apache Hudi, Apache Iceberg, Delta Lake, Apache Paimon) are open specifications combining table metadata and a transaction protocol that give ACID transactions, schema evolution, and time travel to data files like Parquet on object storage, the foundation of the data lakehouse.
Open Technology Fund
The Open Technology Fund (OTF) is an American non-profit, created in 2012 at Radio Free Asia, that funds secure internet-access tools such as Signal and Tor and advances internet freedom.
Open textbook
An open textbook, also called an open source textbook, is a textbook in the public domain or under an open license, free to reuse, revise, and redistribute.
Open thyroidectomy
Open thyroidectomy is a surgical procedure that removes all or part of the thyroid gland through a neck incision, used to treat goiter, hyperthyroidism, nodules, and thyroid cancer.
Open University
The Open University (OU) is a British distance-learning university, incorporated by Royal Charter in 1969 and headquartered at Walton Hall in Milton Keynes, with nearly 200,000 students.
Open ventral hernia repair
Open ventral hernia repair is a surgical procedure that fixes abdominal wall hernias, including incisional hernias, through a direct incision closed and reinforced with mesh.
Open Virtualization Format
Open Virtualization Format (OVF), also called Open Virtual Machine Format, is an open DMTF standard bundling virtual machines with their disks and metadata for transport between virtualization platforms.
Open vSwitch
Open vSwitch is an open source virtual switch, begun by Nicira Networks, that switches traffic between virtual machines and physical networks and is controlled through OpenFlow and a configuration database.
Open wagon
An open wagon, also called an open goods wagon, is a railway freight wagon with no roof, used to carry bulk materials and other weather-tolerant freight.
Open Water (film)
Open Water (2003) is an American survival horror thriller directed by Chris Kentis and produced by Laura Lau, starring Blanchard Ryan and Daniel Travis as divers left adrift among sharks, inspired by the 1998 Lonergan disappearance.
Open Water 2: Adrift
Open Water 2: Adrift, also released as Adrift, is a 2006 German survival thriller by Hans Horn about friends stranded after jumping from a yacht without lowering the ladder; based in part on a Koji Suzuki story, filmed in Malta, not a true sequel to Open Water.
Open WebUI
Open WebUI, formerly Ollama WebUI, is a self-hosted web interface for large language models, connecting to Ollama, vLLM, and OpenAI-compatible servers while bundling chat, RAG, and multi-user management.
Open weights
Open weights are the trained numerical parameters of an AI model, released for public download so users can run or fine-tune the model on their own hardware.