All articles starting with D

Digital television transition

Digital television transition (digital switchover, DSO): countries replacing analog TV broadcasting with digital terrestrial television. US analog shut-off 2009; digital carries up to 20 programs per 6-8 MHz channel, freeing spectrum for mobile broadband and public safety.

Digital television transition in the United States

The U.S. DTV transition ended analog full-power TV broadcasting on June 12, 2009, after a DTV Delay Act postponement from February 17, 2009, aided by NTIA's $40 converter box coupon program and freeing the 700 MHz band for wireless and public safety use.

Digital Terrestrial Multimedia Broadcast

Digital Terrestrial Multimedia Broadcast (DTMB) is China's national standard for terrestrial digital television broadcasting, defined by standard GB 20600-2006 and mandatory since 2007, used in China, Hong Kong, Macao, Cuba, and Pakistan.

Digital terrestrial television

Digital terrestrial television (DTT) is television broadcasting delivered to rooftop or indoor aerials by ground-based transmitters using digital signals, replacing analog broadcasting through a worldwide switchover begun around 2000.

Digital Thread

A digital thread is a connected flow of product and process data spanning a manufactured item's entire lifecycle, from design through production, maintenance, and end of life.

Digital trace data

Digital trace data are records of activity people leave when interacting with websites, social media, apps, sensors, and telecommunication networks, and are a major data source for computational social science.

Digital transformation

Digital transformation is the economic and societal change produced when organizations use digital technologies to alter value propositions, business models, and ways of working, not just convert analog data.

Digital twin

A digital twin is a virtual representation of a physical object, process, or system kept synchronized with its real-world counterpart by data flows and able to feed decisions back.

Digital Underground

Digital Underground was an Oakland alternative hip-hop group formed in 1987 by Shock G, Chopmaster J, and Kenny-K, known for P-Funk-based rap, the Humpty Hump persona, the platinum album Sex Packets, the hit "The Humpty Dance," and launching Tupac Shakur.

Digital video

Digital video is moving imagery represented as sequences of digitally encoded pictures, compressed by codecs like H.264 and stored in containers such as MP4 or WebM.

Digital video recorder

A digital video recorder (DVR), also known as a personal video recorder or PVR, records live digital television to a hard drive rather than tape, replacing the VCR.

Digital Visual Interface

Digital Visual Interface (DVI) is a video interface standard introduced in 1999 to carry uncompressed digital video from a computer to a monitor or projector.

Digital volume correlation

Digital volume correlation (DVC) is an image-based technique measuring internal 3D displacement and strain fields in opaque materials and tissues, typically from X-ray CT images.

Digital wallet

A digital wallet, also called an e-wallet or mobile wallet, is a service that manages payment credentials for online and tap-to-pay purchases, including Apple Pay, Google Pay, and PayPal.

Oct 22, 2026

Digital-analog quantum simulation

Digital-analog quantum simulation is a hybrid method combining digital quantum gates with analog evolution blocks, reproducing target system dynamics with fewer gates and less error than purely digital circuits.

Digital-to-analog converter

A digital-to-analog converter, also known as a DAC or D-to-A, is a device that converts digital codes into an analog voltage or current proportional to each code's numeric value.

DIGITALEUROPE

DIGITALEUROPE, formerly EICTA until its 2009 renaming, is a Brussels-based trade association for Europe's digital technology industries, representing 137 corporations and 45 national trade associations across 35 countries.

DigitalGlobe

DigitalGlobe, originally EarthWatch Incorporated, was an American commercial provider of high-resolution Earth-imagery products, operating its own imaging satellites and acquired by Maxar Technologies in 2017.

Digitalis

Digitalis (foxglove), Plantaginaceae genus and cardiac glycoside drug; source of digoxin and digitoxin, Na+/K+-ATPase inhibitors introduced by Withering's 1785 Account of the Foxglove for dropsy and heart failure.

Digitalis lanata

Digitalis lanata (woolly or Grecian foxglove), Plantaginaceae, a biennial/perennial herb native from SE Europe to NW Türkiye, cultivated for digoxin and lanatosides; introduced and weedy in North America.

Digitalis poisoning

Digitalis poisoning, or digoxin toxicity, is poisoning by cardiac glycosides causing GI, neurologic, visual, and cardiac symptoms. Treated with digoxin immune Fab; dialysis is not indicated; mortality around 13-14%.

Digitalis purpurea

Digitalis purpurea, common foxglove, is a biennial European plant with purple tubular flowers, source of cardiac glycosides like digitoxin, codified by Withering in 1785, and toxic in all parts.

DigitalOcean

DigitalOcean is an American cloud computing provider founded in 2012 that offers Linux virtual machines, managed Kubernetes, databases, and object storage to developers and startups, going public in 2021.

Digitaria

Digitaria (crabgrasses), a cosmopolitan Poaceae genus of about 250-267 species published by Haller in 1768; includes lawn weeds D. sanguinalis and D. ischaemum and the West African cereal fonio, Digitaria exilis.

Digitaria sanguinalis

Digitaria sanguinalis, large or hairy crabgrass, is an annual C4 grass native from the Mediterranean to Central Asia and Malesia, now a major global weed of crops, lawns, and turf with documented herbicide resistance.

Digitization

Digitization is the conversion of analog material, such as a photograph or paper document, into digital form by sampling and quantization, also used for creating digital library collections.

Digitization of official gazettes

Digitization of official gazettes is the scanning, metadata extraction, and online publication of government gazettes, the periodicals in which states publish laws, appointments, and official notices.

Digitonin

Digitonin is a steroidal saponin glycoside extracted from the seeds of the purple foxglove, Digitalis purpurea, used in biochemistry as a membrane detergent and as a reagent that precipitates cholesterol.

Digiwin Software (鼎捷软件)

Digiwin Software (鼎捷软件), since 2024 renamed DIGIWIN CO., LTD., is a Shanghai-headquartered industrial ERP and AI software provider rooted in Taiwan's 鼎新电脑, listed in Shenzhen since 2014.