Glossary

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BBC Mobile Accessibility Guidelines(also: BBC MAG)

A comprehensive set of accessibility standards developed by the BBC for mobile application and web content design. The guidelines cover areas including design, editorial, code, and testing, with specific recommendations for touch targets, text sizing, color contrast, and…

Back Tap(also: Back Tap Gesture)

An iOS accessibility feature that allows users to trigger actions by tapping on the back of their iPhone two or three times. Back Tap can be configured to activate shortcuts, accessibility features, or system functions without requiring precise touchscreen interaction. For…

Biometric Authentication(also: Biometrics, Biometric Identification)

A security method that verifies a person's identity using unique biological characteristics such as fingerprints, facial features, iris patterns, or voice. For people with vision impairments, biometric authentication — particularly fingerprint recognition — is widely preferred…

Biometric Authentication(also: Biometrics, Biometric Security, Behavioral Biometrics)

Security technology that uses unique biological or behavioral characteristics to verify identity, including fingerprints, facial recognition, iris scans, voice patterns, and handwritten signatures. Accessibility considerations are critical because many biometric systems assume…

BlindSquare

A GPS-based iOS accessibility app designed for people who are blind or have low vision, providing spoken information about the surrounding environment — nearby points of interest, intersections, street names, and compass direction — drawn from OpenStreetMap and Foursquare data.…

Braille Input(also: Braille Keyboard Input, Braille Screen Input)

A text entry method that allows users to type characters using Braille code on a device, rather than a standard QWERTY keyboard. On touchscreen devices, Braille input typically maps finger taps or gestures to the six dots of a Braille cell, enabling blind users who know Braille…

Braille Screen Input(also: BSI)

A built-in iOS accessibility feature that turns the touchscreen of an iPhone or iPad into a virtual Braille keyboard. When activated through VoiceOver, users can type Braille characters by tapping the screen with multiple fingers simultaneously, mimicking the six-key layout of a…

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