Glossary
Searchable terminology from accessibility, web standards, and related fields.
6660 terms — page 305 of 333
- Unified Web Evaluation Methodology (UWEM)
- A standardized methodology developed by the European Web Accessibility Benchmarking Cluster (WAB Cluster) for evaluating the accessibility of websites in a consistent, comparable way. UWEM provides fo…
- Unimanual Input (One-Handed Input, Single-Handed Interaction)
- Interaction techniques designed to be operated with only one hand, enabling access for users who cannot use both hands due to disability, injury, or situational constraints. In VR contexts, unimanual …
- Unimodal Interface (Single-Mode Interface)
- An interface that accepts input through only one mode or channel of interaction, such as keyboard-only, voice-only, or gesture-only input. In contrast to multimodal interfaces that combine multiple in…
- Unistroke Gesture (Single-Stroke Gesture, Unistroke)
- A unistroke gesture is a shape or symbol drawn in a single continuous stroke on a touch screen or digitizer, which is then recognized by software as a specific command or input. In accessible interfac…
- Unit Selection Synthesis (Concatenative Unit Selection, Unit Selection TTS)
- A text-to-speech synthesis approach that generates speech by selecting and concatenating variable-length segments of pre-recorded human speech from a large database to match the input text. Unit selec…
- Unity Assumption
- A concept from multisensory-perception research (Welch and Warren, 1980; Welch, 1999) describing the observer's implicit judgement that signals arriving through different senses originate from the sam…
- Universal Access (Universal Accessibility)
- The principle and practice of designing products, environments, programs, and services to be usable by all people, to the greatest extent possible, without the need for adaptation or specialized desig…
- Universal Access Reference Model (UARM)
- A conceptual framework for understanding and addressing the full range of user needs in information and communication technology. The Universal Access Reference Model provides a structured approach to…
- Universal Accessibility (Accessibility for All)
- A broad approach to accessibility that goes beyond technical compliance with specific disability-focused guidelines to encompass the needs of all users regardless of age, experience, cultural backgrou…
- Universal Background Model (UBM)
- A Universal Background Model (UBM) is a large Gaussian Mixture Model trained on speech from many speakers to represent speaker-independent acoustic characteristics. The UBM serves as a reference distr…
- Universal Credit (UC)
- A UK means-tested social security payment that consolidates six legacy benefits (including Income Support, Housing Benefit, and Employment Support Allowance) into a single monthly digital claim. Unive…
- Universal Design (UD)
- A design philosophy and practice that aims to create products, environments, and systems usable by all people, to the greatest extent possible, without the need for adaptation or specialized design. O…
- Universal Design (UD, Design for All, Inclusive Design)
- Universal Design is the design philosophy and practice of creating products, environments, and systems that are usable by all people, to the greatest extent possible, without the need for adaptation o…
- Universal Design Resources (UDR, Design Guidelines)
- Documents, standards, guidelines, and educational materials created to help designers and developers implement universal design principles in their products and services. UDRs range from legally bindi…
- Universal Design for Learning (UDL)
- An educational framework based on neuroscience research that guides the design of flexible learning experiences to accommodate individual learning differences. UDL provides three core principles: mult…
- Universal Maths Conversion Library (UMCL)
- An open-source programming library that encapsulates converters for different Braille mathematical codes, enabling applications to convert between MathML and various national Braille mathematical nota…
- Universal Remote Console (URC, URC Framework)
- The Universal Remote Console (URC) is an ISO/IEC standard framework (ISO/IEC 24752) that enables pluggable, alternative user interfaces for applications and devices. URC separates the user interface f…
- Universal Screening (Population Screening, Mass Screening)
- A systematic assessment process applied to all individuals in a defined population (such as all students in a school) to identify those who may be at risk for a particular condition, regardless of whe…
- Universal Usability
- An approach to technology design that aims to make systems usable by the widest possible range of people, including children, older adults, people with various impairments, people engaged in other tas…
- Universal Verifiability (Public Verifiability)
- Universal verifiability is a security property of election systems that enables any third party — not just registered voters — to independently audit and confirm that the published election outcome co…