A daemon is a long-running background process on Unix-like servers that runs without a terminal and provides a service such as SSH,…
A daguerreotype is the first commercial photographic process, producing a unique, highly detailed image on a polished silver-coated copper plate.
Dark mode is a UI design color scheme that shows light text and elements on dark surfaces, offered as an alternative to…
Dark patterns are interface designs that push users into choices against their interest, now restricted by EU and US consumer and data…
A darkroom is a light-controlled room where photographers develop film and make prints from negatives using chemical processes and safelights.
Darwin is the open-source Unix-like core of macOS, combining the XNU kernel, BSD libraries and system utilities beneath Apple's proprietary interface layers.
A dashboard is a single-screen visual display of the key metrics needed to monitor a process or goal, combining charts, numbers and…
DAST (dynamic application security testing) probes a running application from the outside to find vulnerabilities that appear at runtime.
The Data Act is the EU regulation that gives users of connected products access to their data and sets rules for data…
A data catalog is a searchable inventory of an organization's data assets and their metadata, supporting discovery, ownership, lineage and governance.
Data classification in data governance assigns data to sensitivity categories, such as public or restricted, that determine how it is protected and…
Data cleaning is the process of detecting and correcting errors, inconsistencies and gaps in a dataset so that analysis and models produce…
A data controller is the person or organization that decides why and how personal data is processed and carries primary legal responsibility…
A data dictionary documents every data element in a system, with its name, type, allowed values, meaning and owner, so data is…
The Data Governance Act is the EU regulation that sets trusted rules for reusing protected public data, data intermediaries and data altruism.
A data lake is a central repository that stores raw structured and unstructured data at scale in open formats, applying schema only…
Data lineage traces where data comes from, how it is transformed and where it flows, so teams can trust, debug and govern…
Data mapping defines how each field in a source system corresponds to a field in a target system, including the rules that…
Data masking replaces sensitive values with realistic but fictitious or obscured ones so data can be used for testing, support or analytics…
Data minimization is the privacy principle that personal data must be adequate, relevant and limited to what is necessary for a clearly…
Data ownership in data governance assigns a named business role accountability for a data asset, its quality, access rules and fitness for…
A data pipeline is an automated sequence of steps that moves data from sources, transforms it and delivers it reliably to storage…
Data privacy is the right and practice of controlling how personal information is collected, used, shared and kept, and the rules that…
A data processor is an organization that processes personal data on behalf of a data controller, following its documented instructions, not its…
A data protection officer is the independent expert role under the GDPR that advises an organization on data protection and monitors its…
Data quality is the degree to which data is accurate, complete, consistent, timely and valid enough to serve its intended use reliably.
Data retention in data governance defines how long each category of data is kept, why it is kept, and how it is…
A data steward is the person accountable for the day-to-day quality, meaning and correct use of a defined set of data under…
Data transformation converts data from its source structure, format or values into the shape a target system or analysis requires, in batch…
Data visualization encodes data values as position, length, color and shape so that patterns, comparisons and outliers can be seen and understood…
A data warehouse is a central, query-optimized store of cleaned and integrated historical data built for reporting and analytics across an organization.
A database is an organized, persistent collection of structured data managed by a DBMS that controls storage, querying, concurrency and recovery.
A database audit records who accessed or changed which data, when and how, creating a tamper-resistant trail for security and compliance.
A database cluster is a group of database servers that share or replicate data and act as one service for availability, scale…
A database dump is an export of a database's schema and data into a portable file that can recreate the database on…
Database encryption protects stored and transmitted database data with cryptography at the storage, column or application level, backed by key management.
A database role is a named set of privileges in a database system that can be granted to users or other roles…
A database snapshot is a point-in-time image of a database's data, used for fast backups, cloning and recovery to that exact moment.
A dataset is a defined, bounded collection of related data records with a shared structure and meaning, prepared for analysis, processing or…
DaVinci Resolve is a post-production application known for professional color grading, combining editing, visual effects, audio and delivery in one program.
A DBMS, or database management system, is software that stores, retrieves, secures and manages data in databases while enforcing consistency.
DC fast charging feeds direct current from an off-board charger straight into an EV battery, adding hundreds of kilometers of range in…
DDoS mitigation is the set of techniques that detect and absorb distributed denial-of-service traffic so services stay available during an attack.
DDR4 is the fourth generation of DDR SDRAM computer memory, running at 1.2 V with transfer rates of 1600 to 3200 MT/s…
DDR5 is the fifth generation of double data rate SDRAM, the main system memory in current PCs and servers, built for higher…
A de-esser in audio mixing is a frequency-dependent compressor that reduces harsh sibilant sounds such as s, sh and t in vocals…
A dead letter queue holds messages that a system could not process or deliver after its retry limits, isolating them for inspection…
Debian is a community-developed Linux distribution known for its stable releases, APT package management and the free software principles that guide it.
A debugger is a development tool that runs a program under control, letting developers pause it, step through code and inspect variables…
Decentralized identity is a digital identity model in which people hold their own credentials and prove claims without a central identity provider.