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DFI (motherboard manufacturer)
DFI (友通) is a Taiwanese manufacturer of embedded motherboards, system-on-modules, and industrial computers, founded in 1981 as Diamond Flower International, headquartered in Taipei and listed on the Taiwan Stock Exchange as TWSE:2397.
DFS Deutsche Flugsicherung
DFS Deutsche Flugsicherung (DFS) is the German air navigation service provider, a State-owned company that controls all IFR flights in German airspace from four control centers.
DFT-based channel estimation
DFT-based channel estimation is a low-complexity method for estimating the channel frequency response in OFDM receivers, converting least-squares pilot estimates to the time domain to remove noise.
DFT-spread OFDM precoding
DFT-spread OFDM precoding, also called DFT-s-OFDM, is a linear precoding technique that transforms data symbols with a DFT before OFDM mapping, lowering the peak-to-average power ratio.
DGNB
DGNB, or Deutsche Gesellschaft für Nachhaltiges Bauen, is the German Sustainable Building Council, founded in 2007 to certify buildings, districts, interiors, and construction sites for sustainability.
Dhaka Metro Rail
Dhaka Metro Rail, also known as Dhaka Metro or Dhaka MRT, is the mass rapid transit system of Dhaka, Bangladesh. Its first line opened in 2022.
Dhamra LNG Terminal
The Dhamra LNG Terminal is a liquefied natural gas import terminal at Dhamra Port, Odisha, India, commissioned in 2023 and owned by Adani and TotalEnergies.
Dharmasthala Temple
Dharmasthala Temple (ಧರ್ಮಸ್ಥಳ), formally the Shri Manjunatha Swamy Temple, is a Hindu temple to Shiva as Lord Manjunatha in coastal Karnataka, India, run for over 500 years by a Jain family.
DHCPv6
DHCPv6, the Dynamic Host Configuration Protocol for IPv6, is an IETF client/server protocol that assigns IPv6 addresses, delegated prefixes, and configuration parameters, complementing SLAAC; its current standard is RFC 9915.
Dhirauli Coal Mine
Dhirauli Coal Mine is a commercial coal mine in the Singrauli Coalfield, Madhya Pradesh, India, won by an Adani subsidiary in 2020 with 6.5 MTPA capacity.
DHIS2
DHIS2 (District Health Information Software 2) is an open source, web-based health data platform developed by the HISP group at the University of Oslo. It is the world's most widely used health management information system software.
DHL Aviation
DHL Aviation is the air transport arm of DHL Express, a group of owned and partner cargo airlines flying more than 295 freighters through hubs on three continents.
Dhola–Sadiya Bridge
The Dhola–Sadiya Bridge, officially Bhupen Hazarika Setu, is a 9.15 km beam bridge over the Lohit River linking Dhola in Assam with Sadiya, inaugurated in May 2017.
Dhow
A dhow, known in Arabic as dāw, is a lateen-rigged sailing vessel of the Indian Ocean, used for fishing and coastal trade along Arabian, African, and Indian coasts.
Dhruv Batra
Dhruv Batra is a computer scientist working in computer vision and embodied AI, formerly a Georgia Tech professor and Meta FAIR Embodied AI leader, now co-founder of Yutori.
Dhrystone
Dhrystone is a small synthetic benchmark measuring integer performance of processors and compilers, created by Reinhold Weicker in 1984 and scored in DMIPS; it remains in use for embedded processors.
DHT Holdings
DHT Holdings is an independent crude oil tanker company, incorporated in the Marshall Islands and headquartered in Bermuda, whose fleet of 22 very large crude carriers trades internationally.
DI MA-1
The DI MA-1 is a family of 5.56×45mm NATO rifles made in Myanmar by the Directorate of Defence Industries, the standard infantry weapon of the Myanmar Army.
Di Wei
Di Wei (魏迪) is a Chinese electrochemist and nanotechnologist who heads the Iontronics Laboratory at the Beijing Institute of Nanoenergy and Nanosystems, known for iontronic energy storage and triboiontronics.
Dia
Dia is a 1.6-billion-parameter, open-weight text-to-speech model developed by Nari Labs and released in April 2025, generating two-speaker dialogue with laughter, coughs, and other nonverbal sounds.
Dia (browser)
Dia is an AI-first web browser from The Browser Company of New York, the maker of Arc, with a chatbot in the URL bar that can see open tabs.
Diablo Canyon Power Plant
Diablo Canyon Power Plant, also known as Diablo Canyon Nuclear Power Plant, is California's last operating nuclear power plant, run by PG&E on the coast of San Luis Obispo County.
Diaclone
Diaclone is a Japanese transforming and combining robot toy series created by Takara in 1980, whose Car Robots toys Hasbro rebranded as Transformers in 1984; Takara Tomy relaunched it in 2016.
Dial-up Internet access
Dial-up Internet access is a way of connecting to the Internet over the telephone network with a modem, dominant from the early 1990s to the early 2000s.
Dialogue state tracking
Dialogue state tracking (DST) is the task in task-oriented dialogue systems of estimating the user's goal each turn as (slot, value) pairs that guide the system's next action.
Diamant
Diamant, French for diamond, was France's first satellite launch vehicle, flown from 1965 to 1975; its debut launch carried the Astérix satellite and made France the third space power.
Diamer-Bhasha Dam
The Diamer-Bhasha Dam is an under-construction gravity dam on the Indus River in northern Pakistan, designed to store 8.1 MAF of water and generate 4,500 MW.
Diametral pitch
Diametral pitch (DP) is a measure of gear tooth size in inch units, defined as the number of teeth divided by the pitch diameter in inches.
Diamond anvil cell
The diamond anvil cell, also known as the diamond vise, is a laboratory device that generates extreme static pressure by squeezing samples between two opposed diamond tips.
Diamond composites
Diamond composites are material systems combining diamond with metals, ceramics, carbides, or other phases, studied chiefly as heat spreaders for high-power electronics since diamond/silicon carbide composites were first grown in 1992.