Glossary

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Personal-Scale Manufacturing(also: Desktop Manufacturing, Personal Fabrication)

The use of affordable, accessible manufacturing tools such as 3D printers, laser cutters, and CNC machines by individuals or small groups to produce custom physical objects, as opposed to relying on industrial-scale production. In the context of assistive technology,…

Persuasive Technology(also: Behaviour Change Technology, Behavior Change Technology)

Technology designed to change users' attitudes or behaviours through persuasion and social influence rather than coercion. In health and wellness contexts, persuasive technologies use strategies such as goal-setting, self-monitoring, reminders, social comparison, and rewards to…

Physiological Computing(also: Biometric Computing, Biosignal-based Computing)

A computing paradigm that uses real-time physiological signals from the body to inform system responses and adaptations. Common signals include heart rate (via photoplethysmography), skin conductance (galvanic skin response), respiration, and brain activity (EEG). In…

Point Cloud

A set of data points in three-dimensional space, where each point represents a position on the surface of an object or environment, typically captured by depth cameras, LiDAR scanners, or photogrammetry. In accessibility applications, point clouds are used to create virtual…

Pose Estimation(also: Body Pose Estimation, Skeleton Tracking)

A computer vision technique that detects and tracks the positions of human body joints, hands, and facial landmarks from images or video. In accessibility contexts, pose estimation is a foundational technology for sign language recognition systems, gesture-based interfaces, and…

Privacy-Enhancing Technologies(also: PETs)

Tools and techniques that protect user privacy by limiting the collection, use, and dissemination of personal information online. Examples include VPNs, ad blockers, privacy-focused browsers like Brave, encrypted messaging apps, and Do Not Track settings. For users with…

Proximity Detection(also: Proximity Sensing, Proximity-Based Localization)

A method of determining a user's approximate location by measuring their closeness to known reference points, such as BLE beacons or Wi-Fi access points, based on signal strength. In accessible indoor navigation systems, proximity detection is used to localize users at specific…

Proxy Account(also: Delegate Account)

A formal mechanism within a digital system that allows an authorized person to perform tasks on behalf of another user with defined permissions and accountability. In financial technology, proxy accounts enable financial delegates to help older adults or people with disabilities…

QR Code(also: Quick Response Code)

A two-dimensional barcode that encodes information such as text, URLs, or other data in a square matrix of black and white modules. In accessibility contexts, QR codes serve as a bridge between physical objects and digital information — they can be placed on tactile graphics to…

R(also: R Programming Language, R Project, R Statistical Computing)

A free, open-source programming language and software environment widely used for statistical computing, data analysis, and graphical representation. R is the standard tool for statisticians in both academia and industry, offering extensive libraries for creating data…

RAG(also: Retrieval-Augmented Generation)

An AI architecture pattern that pairs a large language model with an external knowledge store (typically a vector index of text chunks) so that, for each user query, relevant documents are retrieved first and injected into the prompt before the model generates a response. RAG…

RFID(also: Radio Frequency Identification, RFID Tag)

A technology that uses electromagnetic fields to automatically identify and track tags attached to objects. RFID tags contain electronically stored information that can be read by RFID readers without line-of-sight contact. In accessibility applications, RFID enables physical…

RSSI(also: Received Signal Strength Indicator, Received Signal Strength Index)

A measurement of the power level of a radio signal received by a device, commonly used in Bluetooth and Wi-Fi based indoor positioning systems. In accessible indoor navigation, RSSI readings from BLE beacons are used to estimate a user's distance from each beacon — stronger…

Reinforcement Learning(also: RL)

A type of machine learning where a system learns to make decisions by performing actions in an environment and receiving rewards or penalties based on the outcomes. Unlike supervised learning, which learns from labelled examples, reinforcement learning discovers optimal…

Scene Change Detection(also: Shot Boundary Detection, Scene Transition Detection)

An automated technique for identifying transitions between different scenes or shots in video content by analyzing visual differences between consecutive frames. In audio description workflows, scene change detection helps determine optimal moments for inserting descriptions, as…

Semantic Analysis(also: Semantic Content Analysis, Semantic Similarity)

The computational process of determining meaning and relationships within text, images, or other content by analyzing their semantic properties rather than just surface-level features. In accessibility, semantic analysis enables automated tools to go beyond detecting the…

Semantic Web(also: Web of Data, Linked Data)

An extension of the World Wide Web in which information is given well-defined meaning through standardized formats and technologies (such as RDFa, OWL, and ontologies), enabling machines to interpret and process web content more intelligently. For accessibility, semantic web…

Short-Form Video Content(also: SFVC, Short-Form Content, SFC)

Brief video content, typically 15–60 seconds long, presented in portrait orientation and consumed via infinite vertical scroll on platforms such as TikTok, Instagram Reels, YouTube Shorts, Facebook Reels, and Douyin. The format has become an important information and community…

Silent Gap Detection(also: Silence Detection, Audio Gap Detection)

An automated technique for identifying periods of silence or absence of speech in audio tracks, used in audio description workflows to find natural insertion points for descriptions. Silent gap detection distinguishes between complete silence (no sound at all) and non-speech…

Smart Home(also: Home Automation, Connected Home)

A residence equipped with networked devices and systems that can be monitored and controlled remotely or automatically, including lighting, heating, security, and entertainment systems. Smart home technology has significant accessibility potential — enabling people with motor…

Smart Home Technology(also: SHT, Smart Home Devices)

Connected devices and systems within a home that can be controlled remotely or automated, including smart speakers, thermostats, lighting, locks, cameras, sensors, and blinds. Smart home technology uses Internet of Things connectivity, voice control, and programmable rules to…

Smart Speaker(also: Voice-Activated Speaker, Intelligent Speaker)

A wireless speaker with an integrated voice assistant that responds to spoken commands, such as Amazon Echo (Alexa), Google Home (Google Assistant), or Apple HomePod (Siri). Smart speakers serve as central hubs for smart home control, allowing users to operate connected devices,…

Social Virtual Reality(also: Social VR, SVR)

Virtual reality platforms designed primarily for social interaction, where users meet, communicate, and engage in shared activities through avatars in three-dimensional virtual spaces. Examples include VRChat, AltspaceVR, and Rec Room. Social VR presents unique accessibility…

Spatial Mapping(also: Environment Mapping, 3D Environment Scanning)

A technology used in mixed reality and augmented reality headsets that scans and creates a digital representation of the physical environment in real time. Spatial mapping identifies surfaces such as floors, walls, tables, and ceilings, enabling virtual objects (holograms) to be…

Speech Synthesis(also: Synthetic Speech, TTS Engine)

The artificial production of human speech by computer, most commonly used in text-to-speech (TTS) systems that convert written text into spoken audio. Speech synthesis is foundational to screen readers and other assistive technologies used by people with visual impairments and…

Sports Analytics(also: Data Analytics in Sports, Performance Analytics)

The use of data collection, statistical analysis, and technology to measure, track, and improve athletic performance, inform coaching decisions, develop game strategies, and enhance the spectator experience. In able-bodied sports, analytics has become a multi-billion dollar…

Surveillance technology(also: Surveillance tech, Monitoring technology)

Technologies that collect, analyse, and track data about individuals' behaviours, locations, bodies, or communications. In disability contexts, surveillance technology raises justice concerns because assistive tools (computer vision for blind users, behaviour monitoring for…

Technology Transfer(also: Tech Transfer)

The process of moving research findings, inventions, and prototype technologies from the laboratory to commercial availability and widespread use. In assistive technology, technology transfer is a critical but often challenging step — many promising devices developed in research…

Telehealth(also: Telepractice, Telemedicine, Virtual Healthcare)

The delivery of healthcare services, clinical assessments, and therapeutic interventions remotely using telecommunications technology such as videoconferencing, phone calls, and digital platforms. Telehealth expanded dramatically during the COVID-19 pandemic and has become an…

Telehealth(also: Telemedicine, Virtual Healthcare, Remote Healthcare)

The delivery of healthcare services through digital communication technologies, including video conferencing, phone calls, and online portals. Telehealth expanded dramatically during the COVID-19 pandemic as in-person appointments became restricted. While telehealth can improve…

Teleoperation(also: Remote Operation, Telerobotics)

Teleoperation is the remote control of a physical system — a robot, manipulator, vehicle, or surgical instrument — by a human operator at a distance, typically using force-feedback haptic devices that let the operator feel contact and resistance from the remote environment.…

Transparent Video Overlay(also: Transparent Video, Video Overlay, Translucent Video)

A display technique where a live video feed is rendered as a semi-transparent layer on top of another application, allowing users to see both the video content and the underlying application simultaneously. In accessibility contexts, transparent video overlays have been used to…

Ubiquitous Computing(also: Ubicomp, Pervasive Computing, Ambient Computing)

Ubiquitous computing is a paradigm where computing is integrated seamlessly into everyday environments and objects, becoming an invisible part of daily life through sensors, smart devices, and networked systems. Examples include smart home devices, automatic doors,…

Video Communication(also: Video Relay, Video-Based Communication)

The use of video technology for real-time or asynchronous communication, including video calls, video messages, and video posts on social media. Video communication is the primary medium for remote sign language use, as sign languages require visual transmission of hand…

Video Processing(also: Video Manipulation, Video Editing Pipeline)

The computational techniques used to analyze, modify, and transform video content, including operations like segmentation, object removal, background replacement, audio separation, caption generation, and visual effects. In accessibility contexts, video processing enables…

Video See-Through(also: VST, Video Pass-Through)

A type of head-mounted display architecture where the user perceives the real world through camera feeds displayed on screens inside the headset, rather than looking directly through transparent lenses. Video see-through systems like the Apple Vision Pro capture the environment…

Video see-through(also: VST, Camera passthrough)

A display approach in head-mounted devices where the user's view of the real world is captured by outward-facing cameras and displayed on screens inside the headset, allowing complete digital manipulation of the visual feed before presentation. For low vision users, video…

Video-Sharing Platform(also: VSP, Video Platform)

An online platform that enables users to upload, share, and view video content, such as YouTube, TikTok, Vimeo, and Instagram Reels. Video-sharing platforms have become important sources of health information and community support for people with disabilities, including those…

Virtual World(also: Virtual Environment, Online Virtual World)

A computer-simulated environment where users interact with each other and digital objects through graphical representations, often in real time. Virtual worlds range from 2D browser-based platforms to fully immersive 3D social VR environments accessed through head-mounted…

Voice Activity Detection(also: VAD, Speech Detection)

A signal processing technique that automatically determines whether a segment of audio contains human speech or not. In accessibility applications, voice activity detection is used in audio description timing systems to identify non-speech segments where descriptions can be…

Voice over IP(also: VoIP, Internet Telephony, IP Telephony)

Technology that enables voice communication over internet protocol networks rather than traditional telephone lines. VoIP applications such as Skype, Zoom, and Teams allow voice and video calls over the internet at low cost. For accessibility, VoIP presents both opportunities…

Voice over Internet Protocol(also: VoIP, IP Telephony, Internet Calling)

Technology that enables voice communication over internet networks rather than traditional telephone lines. VoIP converts voice signals into digital packets transmitted over IP networks, enabling features like video calling, lower costs, and flexible integration with other…

WAP(also: Wireless Application Protocol)

A suite of protocols and specifications designed to enable mobile devices to access internet content and services. WAP defined standards for how mobile devices communicate with web servers, including markup languages (WML, XHTML-MP) optimized for small screens and limited…

Wearable Technology(also: Wearables, Wearable Devices)

Electronic devices designed to be worn on the body, such as smartwatches, fitness trackers, smart glasses, and haptic wristbands. In accessibility contexts, wearable technology offers unique advantages for delivering notifications and information through multiple sensory…

Web Adaptation(also: Content Adaptation, Web Content Adaptation)

The process of automatically modifying web content to improve usability, accessibility, or presentation for specific users, devices, or contexts. Web adaptation techniques include restructuring page layouts, generating content summaries, creating hierarchical outlines of page…

Web Crawler(also: Spider, Web Spider, Web Scraper)

An automated program that systematically browses the World Wide Web by following links from page to page, collecting and indexing content. In accessibility, web crawlers are used as part of large-scale automated accessibility evaluation platforms to collect web pages for…

Web of Things(also: WoT)

An application layer built on top of the Internet of Things (IoT) that uses open web standards — including HTTP, WebSockets, JSON-LD, and semantic web technologies — as a universal platform for interoperability between connected devices. Proposed by the W3C, the Web of Things…

Web-Based Learning(also: WBL, Online Learning, E-Learning)

An educational approach that delivers instructional content and learning experiences through web browsers and internet-connected platforms, encompassing everything from static course websites to interactive simulations and learning management systems. Web-based learning has…

Wireless Sensor Network(also: WSN, Sensor Network)

A distributed network of small, autonomous sensor devices that monitor physical or environmental conditions and wirelessly transmit data to a central system for processing. In assistive technology applications, wireless sensor networks can detect events such as movement,…

X3D(also: Extensible 3D, Extensible 3D Graphics)

An ISO-standard XML-based file format and runtime architecture for representing and communicating 3D scenes and objects on the web. X3D is the successor to VRML (Virtual Reality Modeling Language) and is maintained by the Web3D Consortium. In the accessibility context, X3D is…