A/B testing is a randomized experiment that compares two versions of a product or message to measure which one causes better results…
An A record is the DNS resource record that maps a host name to a 32-bit IPv4 address so that clients can…
An AAAA record is the DNS resource record that maps a domain name to an IPv6 address, the counterpart of the A…
AAB, the Android App Bundle, is the publishing format from which Google Play builds optimized APKs for each device, cutting download size…
AAC, or Advanced Audio Coding, is a lossy perceptual audio codec from the MPEG standards, widely used for streaming, video soundtracks and…
Abstraction in programming exposes only the essential behavior of a component through a simple interface while hiding how that behavior is implemented.
AC charging supplies alternating current to an electric vehicle, whose onboard charger converts it to direct current for the battery at up…
An access log is a server file that records one line per handled request, with client address, time, request, status code, response…
Accessible forms are web forms built so that every user, including keyboard and screen reader users, can understand, complete and correct them.
An accessible name is the text label that assistive technologies announce for an interface element, computed from content, labels or ARIA attributes.
Accessible video is video produced and delivered so that people with hearing, vision, cognitive or motor disabilities can perceive and operate it.
Accuracy in model evaluation is the share of predictions a model gets right, a simple metric that becomes misleading when classes are…
ACES, the Academy Color Encoding System, is a color management framework that unifies cameras, grading, visual effects and deliveries in one standard…
ACID names four transaction guarantees, atomicity, consistency, isolation and durability, that keep database data correct despite crashes and concurrency.
An action in automation is a single step a workflow performs after a trigger fires, such as sending a message, updating a…
An activation function is the nonlinear rule a neural network neuron applies to its weighted input, letting stacked layers model complex patterns.
Activation rate is the share of new sign-ups who reach a defined first-value milestone in a product, a core metric of product-led…
An ad auction is the automated process that decides which ad appears in an available slot and what the advertiser pays, run…
Ad revenue share is the creator monetization model in which a platform pays creators an agreed percentage of the advertising income their…
Adaptive cruise control is a driver assistance feature that holds a set speed and automatically keeps a safe time gap to the…
Adaptive layout is a mobile UX approach in which an app switches between distinct layouts based on screen size, orientation, posture and…
ADAS (advanced driver assistance systems) are vehicle functions that warn, brake or steer to support the driver while the driver stays responsible.
Add to home screen is the mobile browser feature that places a website icon on the phone's home screen and can launch…
An administrator account is a user account with elevated rights to install software, change system settings and manage other users on an…
Adobe After Effects is a layer-based compositing and animation application used to create motion graphics, visual effects and animated titles for video.
Adobe Lightroom is photo management and RAW processing software that edits images non-destructively and organizes large libraries for photographers.
Adobe Photoshop is a raster graphics editor used in graphic design for photo retouching, compositing, image correction and pixel-based artwork.
Adobe Premiere Pro is a professional non-linear video editing application for assembling, trimming, mixing, grading and exporting footage on a timeline.
An advertising ID is a resettable device identifier that mobile operating systems give apps for ad targeting, measurement and attribution, subject to…
AES is the symmetric block cipher of modern cryptography that encrypts 128-bit blocks with 128-, 192- or 256-bit keys and secures most…
Affiliate marketing is a performance-based channel in which online stores pay partner publishers a commission for sales or leads they refer.
Age verification confirms that an online user meets a legal age threshold, a core duty under online safety laws for adult and…
Agent automation uses AI agents that plan steps and call tools toward a goal, rather than following a fixed workflow defined in…
Agent memory is the set of mechanisms that let an AI agent keep, retrieve and update information across steps, sessions and tasks…
Agent orchestration is the control layer that sequences, routes and supervises the steps, tools and sub-agents of AI agents in a multi-step…
Agentic AI describes AI systems that pursue goals with autonomy, planning steps, calling tools and acting on results with limited human direction.
An AI agent is a system that pursues a goal by observing its environment, planning steps and acting through tools in a…
AI alignment is the work of making AI systems pursue the goals, values and constraints their designers and users actually intend, even…
An AI benchmark is a fixed set of tasks, data and scoring rules used to measure and compare the capabilities of AI…
AI bias is a systematic error that makes an AI system produce unfair or skewed outcomes for certain groups, inputs or situations…
An AI citation is a source reference that an AI search system attaches to a generated answer, crediting the web page whose…
AI data leakage is the unintended exposure of personal or confidential data through AI systems, via prompts, training data, model outputs or…
An AI gateway is a proxy layer between applications and AI model providers that centralizes routing, access control, cost tracking, caching and…
AI guardrails are the technical and policy controls placed around an AI model that check its inputs, outputs and actions against safety…
AI Overviews are generated answer summaries at the top of Google results that cite source pages, reshaping visibility and clicks in AI…
AI red teaming is the structured adversarial testing of AI models and systems to uncover harmful, insecure or unintended behavior before attackers…
AI search is a way of answering queries in which a language model retrieves sources and writes a synthesized answer instead of…
An AI training opt-out is a setting, signal or request that stops a provider from using a person's data or content to…
An AI workflow is an automated process with a predefined sequence of steps in which AI models classify, extract, generate or summarize…
An air cooler is a CPU cooling device that moves processor heat through a metal base and heat pipes into a finned…