S3 is the Amazon Simple Storage Service, a cloud object storage service whose HTTP API became the de facto standard for storing…
SaaS, or software as a service, is a cloud model in which a provider runs a complete application and customers use it…
Safari is Apple's built-in web browser for macOS, based on the WebKit engine, with tracking prevention, profiles, iCloud sync and strong energy…
A safe area is the region of a mobile screen that no notch, rounded corner, status bar or gesture indicator covers, so…
Safe mode is a diagnostic startup that loads an operating system with minimal drivers and services so faults can be isolated and…
A safety controller is a certified robot safety device that monitors speed, position and safety inputs and stops the robot when a…
Safety stock is the extra inventory a store keeps above expected demand during the replenishment lead time to absorb demand and supply…
Sales-led growth is a go-to-market strategy in which a sales team, not the product alone, drives customer acquisition, deal closing and account…
The same-origin policy is the browser security rule that stops scripts from one origin reading data from another unless that origin permits…
Sample rate is the number of times per second a digital audio system measures a signal, which sets the highest frequency it…
Sample size in experimentation is the number of units each variant needs so an experiment can reliably detect an effect of a…
A SAN, or storage area network, is a dedicated network that gives servers block-level access to shared storage arrays as if they…
SAST, static application security testing, analyzes source code, bytecode or binaries without running them to find security flaws early in development.
SATA is the serial interface that connects hard drives, SSDs and optical drives to a computer, with a ceiling of 6 Gbit/s…
Satellite internet is broadband access delivered by radio links between a user terminal, orbiting satellites and ground stations connected to the internet.
Saturation in color theory describes how pure or intense a color is, ranging from a vivid hue to a neutral gray with…
A savepoint is a named marker inside a database transaction that allows a partial rollback to that point without aborting the whole…
Savings Plans are cloud pricing agreements that trade a one- or three-year hourly spend commitment for discounted rates on eligible compute usage.
An SBOM is a machine-readable inventory of every component and dependency in a software product, used to track vulnerabilities, licenses and supply…
A scanner is a computer peripheral that converts paper documents, photos or film into digital images by measuring reflected or transmitted light.
A scatter plot is a chart that places each observation as a point on two numeric axes to reveal relationships, clusters and…
A scheduled trigger starts an automated workflow or integration at defined times or intervals, such as hourly syncs or nightly batch jobs.
A schema in databases is the formal definition of how data is organized, including its tables, columns, data types, keys and constraints.
Schema.org is the shared vocabulary of types and properties that websites use in structured data to describe their content to search engines…
A screen reader is assistive software that converts on-screen content into speech or braille, a core consideration in accessibility and design.
SDH, subtitles for the deaf and hard of hearing, are subtitles that add speaker names, sound effects and music cues so viewers…
SDI (Serial Digital Interface) is the broadcast standard for sending uncompressed digital video over coaxial cable with very low, fixed latency.
SDLC, the software development life cycle, is the structured sequence of phases that takes software from planning and design through release and…
SDR, or standard dynamic range, is the conventional video format mastered for about 100 nits peak brightness with Rec. 709 color and…
Search intent is the underlying goal behind a search query, which in SEO decides what type of page and content can rank…
Seccomp is a Linux kernel feature that restricts which system calls a process may make, shrinking the kernel attack surface of sandboxes…
Secure Boot is a UEFI firmware feature that lets a PC start only bootloaders and drivers signed by trusted keys, blocking boot-level…
A Secure Enclave is an isolated security processor in a mobile chip that guards keys and biometric data even when the main…
A security audit is a systematic, evidence-based evaluation of how well an organization's security controls meet a defined standard or policy.
A security camera in home security is a connected video camera that records, detects motion and sends alerts so the home can…
A security group is a stateful virtual firewall in cloud networking that allows or blocks traffic to instances by protocol, port and…
A security playbook is a documented, step-by-step procedure for handling one specific type of security incident, from detection through recovery.
A security policy is a management-approved document that sets an organization's rules, responsibilities and expectations for protecting information.
A seed phrase is a list of 12 to 24 words that encodes the master secret of a crypto wallet and can…
A seed round is the first substantial startup funding round, in which investors exchange capital for equity or convertible rights to finance…
SELECT is the SQL statement that retrieves data from database tables, declaring which rows and columns to return and leaving the execution…
Selective disclosure lets a credential holder reveal only chosen attributes of a signed digital identity credential while the verifier can still trust…
Selenium is an open-source framework for automating web browsers through the WebDriver protocol, widely used for cross-browser web testing.
SELinux is a Linux security module that enforces mandatory access control, confining processes by labels and policy even when they run as…
Semantic HTML is the practice of marking up web content with elements that describe its meaning, improving accessibility, SEO and maintainability.
Semantic search retrieves documents by meaning rather than exact keywords, comparing vector embeddings of the query and the content in AI retrieval…
Semantic structure is the use of meaningful HTML elements, headings and landmarks so assistive technologies can understand and navigate a web page.
Semantic Versioning is a MAJOR.MINOR.PATCH numbering scheme that tells software users whether a release breaks, extends or only fixes a public API.
Semi-structured data carries its own structure through tags or keys, as in JSON and XML, without requiring a fixed schema defined in…
Sensor fusion combines data from several robot sensors into one estimate of state or surroundings that is more accurate and reliable than…