Technology and the built world

D-Bus

D-Bus is an interprocess communication system built around a central message bus, started at Red Hat in 2002 and now a standard part of Linux desktops like GNOME and KDE.

D-ID

D-ID, or De-Identification Ltd., is an Israeli generative AI company founded in Tel Aviv in 2017, known for turning photos and scripts into talking avatar videos.

d-Matrix

d-Matrix is a Santa Clara, California semiconductor startup, founded in 2019 by Sid Sheth and Sudeep Bhoja, that builds low-latency AI inference accelerators using digital in-memory compute.

D-MPNN, or directed message passing neural network, is a graph neural network architecture for molecular property prediction that passes messages between directed bonds rather than atoms, introduced at MIT in 2019.

D-segment

The D-segment, also called large family cars, is the European classification for upper-medium passenger cars one size above the C-segment, including models like the Volkswagen Passat and Audi A4.

D-subminiature

The D-subminiature, commonly called a D-sub or DB connector, is a family of electrical connectors with a D-shaped metal shell, introduced by Cannon in 1952 and widely used on computers for serial and video ports.

D-Wave 2X

The D-Wave 2X was a quantum annealing processor built by D-Wave Systems and launched in 2015, the company's third generation and its first with over 1,000 qubits.

D-Wave Advantage2

D-Wave Advantage2 is D-Wave's sixth-generation quantum annealing computer with more than 4,400 superconducting qubits in the Zephyr topology, generally available through Leap and on premises since May 2025.

D-Wave One

The D-Wave One was a 128-qubit quantum annealing computer built by D-Wave Systems and sold to Lockheed Martin in 2011, often called the first commercial quantum computer.

Sep 21, 2026

D. A. Dornfeld

D. A. Dornfeld, born David Alan Dornfeld, was an American mechanical engineer and longtime UC Berkeley professor known for acoustic emission monitoring, chemical-mechanical planarization, and sustainable manufacturing, elected to the National Academy of Engineering in 2013.

D. B. Cooper

D. B. Cooper, also known as Dan Cooper, is the name given to an unidentified man who hijacked a plane in 1971 and parachuted away with $200,000.

D. B. Cooper in popular culture

D. B. Cooper in popular culture covers the books, films, television shows, songs, and Pacific Northwest traditions inspired by the unidentified hijacker who vanished with $200,000 in 1971.

Sep 21, 2026

D. Brainerd Holmes

D. Brainerd Holmes was an American electronics engineer who directed NASA's Office of Manned Space Flight from 1961 to 1963, approved lunar-orbit rendezvous for Apollo, and later led Raytheon.

D. Nathan Meehan

D. Nathan Meehan is an American petroleum engineer, professor at Texas A&M University, and 2015 SPE president elected to the National Academy of Engineering in 2022.

D. Roger J. Owen

D. Roger J. Owen, born David Roger Jones Owen, was a Welsh computational mechanician who spent his career at Swansea University and co-founded Rockfield Software Ltd in 1985.

D.A. Thomas

The D.A. Thomas was a sternwheel steamboat built on the Peace River in 1916, one of the river's largest sternwheelers, named for the Welsh industrialist David Alfred Thomas, later Viscount Rhondda.

d.light

d.light is an off-grid solar energy company founded by Sam Goldman and Ned Tozun at Stanford in 2007, selling solar lanterns and home systems on pay-as-you-go plans in Africa and India.

Sep 21, 2026

D.Q. Mayne

D.Q. Mayne, also known as David Q. Mayne, was a South African-born control engineer who founded Imperial College London's Control Group and made model predictive control industrially reliable.

D1 (Sony)

D1, or D-1, is a Sony digital videotape format introduced in 1986, the first practical component digital video format, recording uncompressed video on 19 mm tape.

D18

D18 is a narrow-bandgap conjugated polymer donor used in organic solar cells. Reported in 2020, it achieved 18.22% efficiency with the acceptor Y6 and became a benchmark donor polymer.

D2L Brightspace

D2L Brightspace is a cloud-based learning management system from D2L, a Canadian company John Baker founded in 1999, serving schools, universities, and businesses with course delivery, assessment, and analytics tools.

D3.js

D3.js (Data-Driven Documents) is a free, open-source JavaScript library for visualizing data on the web, created by Mike Bostock, Vadim Ogievetsky, and Jeffrey Heer at Stanford.

D35 motorway (Czech Republic)

The D35 motorway is a planned Czech motorway linking Liberec, Hradec Králové, and Olomouc to Lipník nad Bečvou, and at over 260 km the country's longest expressway.

D4RL

D4RL (Datasets for Deep Data-Driven Reinforcement Learning) is a benchmark of logged-trajectory datasets and paired simulators for offline reinforcement learning, created at UC Berkeley and Google Brain and released in April 2020.

D9 (Digital-S)

D9, originally called Digital-S, is a professional digital videotape format introduced by JVC in 1995, recording 4:2:2 digital video at 50 Mbps on half-inch tape cassettes.

Da Nang Air Base

Da Nang Air Base (Da Nang AB) was a major US and South Vietnamese airfield in central Vietnam during the war, now Da Nang International Airport.

da Vinci Research Kit

The da Vinci Research Kit (dVRK) is an open-source research platform that converts decommissioned da Vinci surgical systems for research, used by more than 40 robotics groups.

Da Vinci's self supporting bridge

Da Vinci's self supporting bridge is a nail-free wooden bridge design sketched by Leonardo da Vinci in the Codex Atlanticus, held together by gravity and friction alone.

Daandine Gas Field

The Daandine Gas Field is a coal seam gas field in the Surat Basin near Dalby, Queensland, owned by Arrow Energy, with commercial gas production beginning in September 2006.