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Opel Meriva
The Opel Meriva, sold in the UK as the Vauxhall Meriva, is a compact minivan built by Opel from 2003 to 2017, known for its flexible rear seating.
Opel Mokka
The Opel Mokka, sold as the Vauxhall Mokka in the United Kingdom, is a German subcompact crossover SUV produced since 2012, with a fully redesigned second generation launched in 2021.
Opel Omega
The Opel Omega, also sold as the Vauxhall Omega, was an executive sedan built by Opel in Germany from 1986 to 2003 in two generations.
Opel Senator
The Opel Senator, sold in Britain as the Vauxhall Royale and Vauxhall Senator, was Opel's flagship executive saloon, built from 1978 to 1993 in two generations.
Opel Sintra
The Opel Sintra, sold as the Vauxhall Sintra in the United Kingdom, was a full-size MPV sold by Opel from 1997 to 1999, derived from an American minivan design.
Opel Tigra
The Opel Tigra, sold as the Vauxhall and Holden Tigra, is a small sports coupé from German automaker Opel, launched in 1994 on the Corsa B platform.
Opel Vectra
The Opel Vectra, sold as the Vauxhall, Holden, and Chevrolet Vectra, is a mid-size family car built by Opel from 1988 to 2008 through three generations.
Opel Zafira
The Opel Zafira, sold in the UK as the Vauxhall Zafira, is a compact MPV built by German manufacturer Opel and first shown in 1999 as the first seven-seat compact van.
Open (main beam) tunnel boring machine
An open (main beam) tunnel boring machine, or gripper TBM, is a shieldless hard-rock machine that advances by gripping the tunnel walls as its thrust base.
Open addressing
Open addressing, also called closed hashing, is a hash-table collision-resolution technique that stores all elements in the table's array, resolving collisions by probing for empty slots.
Open API
Open API refers to the OpenAPI Specification, a language-agnostic standard for describing HTTP APIs, renamed from Swagger after its 2015 donation to the Linux Foundation.
Open Babel
Open Babel is an open-source cheminformatics toolkit, written in C++ and started in 2001, that converts chemical data between over 100 file formats and provides a library usable from Python and other languages.
Open Bionics
Open Bionics is a British medical device company based in Bristol, founded in 2014 by Joel Gibbard and Samantha Payne, known for the Hero Arm, a 3D-printed myoelectric hand.
Open Cascade Technology
Open Cascade Technology (OCCT) is an open-source, object-oriented C++ class library for 3D surface and solid modeling, CAD data exchange, and visualization, developed by the French company Open Cascade SAS.
Open Catalyst 2020
Open Catalyst 2020 (OC20) is a dataset of over 1.2 million density functional theory calculations of adsorbates on catalyst surfaces, released by Facebook AI Research and Carnegie Mellon University in October 2020.
Open Catalyst 2022 (OC22) dataset
The Open Catalyst 2022 (OC22) dataset is a public set of 62,331 density functional theory relaxations of adsorbates on oxide surfaces for training machine learning electrocatalyst models.
Open Charge Alliance
The Open Charge Alliance is a non-profit organization, founded in 2014, that develops and governs the Open Charge Point Protocol, the open communication standard between electric vehicle charging stations and central systems.
Open Charge Point Protocol
The Open Charge Point Protocol (OCPP) is an open communication protocol between electric vehicle charging stations and management systems, maintained by the Open Charge Alliance.
Open collector
An open collector is an integrated-circuit output, also called open drain, that can pull a line low but needs an external pull-up resistor to drive it high.
Open container law
An open container law is a statute banning open alcoholic beverage containers and drinking in the passenger area of a motor vehicle, whether by the driver or passengers.
Open data
Open data is data anyone is free to use, reuse, and redistribute without legal, technological, or social restriction, most often data from public bodies such as governments.
Open Data Contract Standard
Open Data Contract Standard (ODCS), a Bitol/Linux Foundation vendor-neutral YAML format for data contracts describing dataset schema, quality, SLAs, ownership, and servers; current version v3.2.0; successor to the deprecated Data Contract Specification.
Open Data Product Standard
Open Data Product Standard (ODPS), Bitol's open YAML specification for describing data products (identity, ports, team, AI-agent context), current version v1.1.0; sister of ODCS; distinct from the Open Data Product Specification at opendataproducts.org.
Open Database Connectivity
Open Database Connectivity (ODBC) is a standard API, first released by Microsoft in 1992, that lets one application access many database systems with the same code.
Open Dynamics Engine
The Open Dynamics Engine (ODE) is a free library for simulating rigid body dynamics, created by Russell L. Smith in 2001 and used in robotics simulators.
Open Fan
Open Fan is an aircraft engine architecture without a nacelle, enabling a bypass ratio over 60 and targeting roughly 20% lower fuel burn than today's engines.
Open Graph Benchmark
The Open Graph Benchmark (OGB) is a 2020 Stanford collection of large-scale benchmark datasets for graph machine learning, covering node, link, and graph prediction tasks with standardized evaluation and public leaderboards.
Open Graphics Project
The Open Graphics Project was a community effort begun in 2004 to design a fully documented, patent-free graphics card, producing the OGD1 FPGA development board in 2010.
Open Handset Alliance
The Open Handset Alliance is a Google-led consortium announced in 2007 by 34 founding companies including T-Mobile, HTC, and Qualcomm to develop Android, a free, open mobile platform.
Open Images dataset
Open Images is a computer vision dataset released by Google Research in 2016, with about 9 million Flickr images annotated with labels, bounding boxes, segmentation masks, and relationships.