Glossary
Searchable terminology from accessibility, web standards, and related fields.
73 results found in Mobile Accessibility.
- T9 (Text on 9 Keys, Tegic T9)
- T9 (Text on 9 Keys) is a dictionary-based predictive text-entry method developed by Tegic Communications in the 1990s for mobile phone keypads with multiple letters assigned to each numeric key. Rathe…
- Tappability (Tap Target, Tappable)
- The property of a user interface element that indicates whether it can be activated by tapping on a touchscreen device. Tappability is a key concern in mobile accessibility because elements that appea…
- Text Messaging (SMS, Short Message Service, Texting, MMS, Multimedia Messaging Service)
- Text messaging is the exchange of short written messages between mobile devices over a cellular or data network, most commonly using the SMS (Short Message Service) or MMS (Multimedia Messaging Servic…
- Text Scaling Assistive Service (TSAS, Font Size Scaling)
- An Android platform service that allows users to increase or decrease the size of text displayed across applications. Text Scaling Assistive Service is critical for users with low vision who need larg…
- Touch Exploration (Explore by Touch, Touch-Based Exploration)
- An interaction method that allows users to discover on-screen content by moving their finger across a touchscreen, receiving audio feedback about elements under the fingertip. Touch exploration is fun…
- Touch Target (Tap Target, Hit Area, Target Size)
- A touch target is the area on a touchscreen interface that responds to a user's tap or touch input. Accessibility guidelines recommend minimum touch target sizes to ensure that people with motor impai…
- Touch-to-Explore (Touch Exploration, Explore by Touch)
- An interaction mode used by touchscreen screen readers (such as VoiceOver on iOS and TalkBack on Android) where users drag their finger across the screen to discover and hear descriptions of interface…
- Touchscreen (Touch Screen, Touch Display)
- An input and display device that detects touch gestures directly on its surface, allowing users to interact with content by tapping, swiping, pinching, or dragging. While touchscreens enable intuitive…
- Touchscreen Accessibility (Touch Interface Accessibility)
- Touchscreen accessibility refers to the design principles, techniques, and assistive technologies that make touchscreen devices usable by people with disabilities. This includes screen reader gestures…
- View Hierarchy (UI Hierarchy, Accessibility Hierarchy, DOM Tree)
- The tree-structured representation of how user interface elements are organized and nested within an application. The view hierarchy defines parent-child relationships between UI components, specifyin…
- Voice User Interface (VUI, Voice Command Interface, Voice Interface)
- An interface that allows users to interact with a device or application through spoken language commands rather than touch, mouse, or keyboard input. Voice user interfaces use automated speech recogni…
- Voicemail (Voice Mail, Voice Messaging)
- Voicemail is a telecommunications service that records an audio message from a caller when the called party is unavailable, for later retrieval by the recipient. Accessibility considerations include: …
- Wi-Fi Fingerprinting (WiFi Fingerprinting, Wi-Fi Positioning)
- An indoor localization technique that estimates a device's position by comparing the signal strengths of nearby Wi-Fi access points against a pre-collected database of "fingerprints" — measurements ta…