Glossary: Letter O

An open authorization framework that allows third-party applications to access a user's resources without exposing their credentials. OAuth 2.0 defines authorization flows for web apps, mobile apps, d...

Wavefront OBJ: a simple, open geometry definition file format. It represents 3D geometry with vertices, normals, texture coordinates, and faces.

OLE Control Extension: a Windows ActiveX/OLE control component providing reusable UI elements for Visual Basic and other Windows applications.

Source code for OCaml, a multi-paradigm language with a powerful type system. Used in formal verification, compilers, and financial systems.

OpenDocument Formula: an open standard format for mathematical formulas within the OpenDocument family, used by LibreOffice Math.

OpenDocument Graphics: an open standard format for vector drawings maintained by OASIS. It is the default format for LibreOffice Draw.

OpenDocument Presentation: an open standard presentation format maintained by OASIS. It is the default format for LibreOffice Impress.

OpenDocument Spreadsheet: an open standard spreadsheet format maintained by OASIS. It is the default format for LibreOffice Calc.

OpenDocument Text: an open standard document format maintained by OASIS. It is the default format for LibreOffice Writer and other open-source office suites.

An open, patent-free lossy audio compression format within the Ogg container. It offers quality comparable to or better than MP3 at similar bitrates.

An open, royalty-free video container format using the Theora video codec within the Ogg container. An early open alternative to proprietary web video formats.

Open Neural Network Exchange: an open format for representing machine learning models, enabling interoperability between PyTorch, TensorFlow, and other frameworks.

Outline Processor Markup Language: an XML format for outlines and hierarchical data. Commonly used to import/export RSS feed subscriptions between readers.

Optimized Row Columnar: a columnar storage format for Hadoop workloads, offering high compression and fast reads for analytical queries in Hive and Spark.

Object-Relational Mapping: a programming technique that converts data between a relational database and object-oriented code, allowing developers to interact with the database using their programming...

OpenStreetMap XML: the native data format for OpenStreetMap, the collaborative open map project. Contains nodes, ways, and relations describing geographic features.

Open Shortest Path First: a link-state routing protocol used within large enterprise networks to find the best path for data packets. OSPF uses Dijkstra's algorithm to calculate the shortest path and...

OpenType Font: a scalable font format developed jointly by Microsoft and Adobe. It extends TrueType with advanced typographic features, ligatures, and multi-language support.

Open Web Application Security Project: a nonprofit foundation that works to improve the security of software. OWASP is best known for its Top 10 list of the most critical web application security risk...

Open XML Paper Specification: the updated, ECMA-standardized version of XPS for fixed-layout document exchange.