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DC-to-DC converter
A DC-to-DC converter is an electronic circuit that converts one DC voltage to another, using switching transistors, inductors, capacitors, or transformers to reach efficiencies up to 96%.
DCI-P3
DCI-P3, also known as the P3 color space, is a wide-gamut RGB color space defined by Digital Cinema Initiatives in 2005 for theatrical digital projection.
DCP Midstream
DCP Midstream, LP was an American master limited partnership with natural gas gathering, processing, logistics, and marketing assets, and a major natural gas liquids producer acquired by Phillips 66 in 2023.
DCS 1800
DCS 1800, later renamed GSM 1800, is a variant of the GSM cellular standard operating in the 1800 MHz band, created by ETSI in 1990.
Dd (Unix)
Dd, or Unix dd, is a command-line utility in Unix and Unix-like systems that copies raw data between files and devices, used for writing disk images, forensic imaging, and rescuing damaged media.
DD Free Dish
DD Free Dish, launched as DD Direct+ in December 2004 and renamed in 2013, is India's only free-to-air DTH satellite TV service, operated by Doordarshan under Prasar Bharati.
DDR SDRAM
DDR SDRAM (Double Data Rate SDRAM), also called DDR RAM, is computer memory that transfers data twice per clock cycle, doubling the rate of earlier SDRAM.
DDR2 SDRAM
DDR2 SDRAM is a computer memory standard, the second generation of DDR SDRAM, defined by JEDEC and shipped in volume from 2004 for Intel's Pentium 4-era desktops.
DDR3 SDRAM
DDR3 SDRAM is a generation of the DDR SDRAM computer-memory standard, released by JEDEC in 2007, running at 800 to 2133 MT/s at 1.5 V.
DDR4 SDRAM
DDR4 SDRAM is a JEDEC computer memory standard that ran at up to 3200 MT/s and 1.2 V, serving as mainstream memory from the mid-2010s.
DDR5 SDRAM
DDR5 SDRAM, or DDR5 RAM, is the fifth generation of DDR memory, introduced in 2021 as DDR4's successor with a 4800 MT/s baseline and 1.1 V supply.
DDR6 SDRAM
DDR6 SDRAM is the planned sixth generation of double data rate memory for desktops and servers, being developed by JEDEC as the successor to DDR5.
DDT
DDT (dichloro-diphenyl-trichloroethane) is a synthetic organochlorine insecticide, discovered by Swiss chemist Paul Müller in 1939, used against malaria and typhus before bans beginning in the 1970s.
De aquaeductu
De aquaeductu, also known as De aquis urbis Romae, is an administrative report by Sextus Julius Frontinus, written around 97 CE as Rome's water official under Nerva, covering the nine aqueducts serving the city.
De Arend (locomotive)
De Arend (The Eagle) is a steam locomotive built in England in 1839 that hauled the first official train in the Netherlands, from Amsterdam to Haarlem.
De Havilland
De Havilland, also known as the De Havilland Aircraft Company, was a British aircraft maker founded by Geoffrey de Havilland in 1920, producing the Moth, the Mosquito, and the Comet.
De Havilland Canada
De Havilland Aircraft of Canada is a Canadian aircraft manufacturer founded in 1928 and headquartered in Calgary, Alberta, known for the Beaver, Twin Otter, and Dash 8.
De Havilland Canada
De Havilland Canada, formally De Havilland Aircraft of Canada Limited, is a Canadian aircraft manufacturer founded in 1928, known for the Beaver, Twin Otter, and Dash 8.
De Havilland Canada Dash 7
The De Havilland Canada Dash 7 is a Canadian four-engine turboprop regional airliner seating up to 50, first flown in 1975 with short takeoff and landing performance.
De Havilland Canada Dash 8
The De Havilland Canada Dash 8 (DHC-8) is a family of twin-engine regional turboprop airliners built in Toronto, ranging from the 37-seat Series 100, first flown in 1983, to the 90-seat Dash 8-400, still in production.
De Havilland Canada DHC-2 Beaver
The De Havilland Canada DHC-2 Beaver, also known as the U-6 Beaver, is a Canadian single-engine bush aircraft first flown in 1947, with about 980 serving US forces in Korea.
De Havilland Canada DHC-3 Otter
The De Havilland Canada DHC-3 Otter is a single-engine STOL utility aircraft built from 1951 to 1967; the US Army was its largest operator, with 200 as the U-1A.
De Havilland Canada DHC-4 Caribou
The De Havilland Canada DHC-4 Caribou, also designated CV-2 and C-7, is a twin-engine STOL cargo aircraft first flown in 1958 that served extensively in Vietnam.
De Havilland Canada DHC-5 Buffalo
The De Havilland Canada DHC-5 Buffalo, designated C-8 or CV-7 by the United States, is a Canadian twin-turboprop STOL tactical transport built from 1965 to 1986.
De Havilland Canada DHC-6 Twin Otter
The De Havilland Canada DHC-6 Twin Otter is a Canadian 19-passenger twin-turboprop STOL utility aircraft, first flown in 1965, with 844 built by 1988 and production later revived.
De Havilland Canada E-9 Widget
The E-9A Widget is a US Air Force range-support aircraft, a converted Dash 8 airliner delivered in 1988 that scans the Gulf of Mexico for boats and relays missile telemetry.
De Havilland Comet
The de Havilland Comet was a British four-jet airliner, the world's first commercial jetliner, flying for BOAC from 1952 until fatigue-related crashes ended its career.
De Havilland Dove
The de Havilland Dove, known in military service as the Devon, is a British twin-engine short-haul airliner first flown in 1945, with 544 built and production lasting into the 1960s.
De Havilland Dragon Rapide
The de Havilland Dragon Rapide (DH.89) is a British twin-engine, all-wood biplane airliner that carried up to eight passengers on short-haul routes from 1934; the RAF used it as the Dominie.
De Havilland Hornet
The de Havilland Hornet (DH Hornet) was a British twin-engine, single-seat long-range fighter that first flew in July 1944 and served in the Malayan Emergency.