Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- Fat Finger Problem(also: Fat Finger Effect, Finger Occlusion)
- A fundamental challenge in touchscreen interaction where the user's finger is larger than the target being selected, causing difficulty in precise target acquisition. The finger both occludes (blocks the view of) the target during selection and creates ambiguity about the exact…
- Find My Things(also: FMT)
- A Microsoft-developed smartphone app that lets people who are blind or have low vision train a personalized object recognizer by recording short example videos of their own items, then use the trained model to locate those items later via audio and haptic guidance. Find My…
- Fintech(also: Financial Technology)
- An umbrella term for software and digital-service innovations in the financial sector, including online and mobile banking, payments (e.g., Apple Pay, PayPal), budgeting apps, investment platforms, digital wallets, cryptocurrency services, and Buy-Now-Pay-Later products. Fintech…
- Floating Action Button(also: FAB)
- A circular button that floats above the user interface in Android apps, typically representing the primary action on a screen. Defined by Google's Material Design guidelines, FABs usually display a simple icon (such as a plus sign, pencil, or heart) without visible text labels.…
- Focusable Element(also: Keyboard Focusable, Focus Target)
- A GUI element that can receive input focus, allowing users to interact with it via keyboard, switch device, or assistive technology. For screen reader users navigating mobile apps, an element without focus enabled is essentially invisible—they cannot select, activate, or even…
- Form Factor(also: Device Form Factor, Handset Form Factor)
- Form factor refers to the overall physical size, shape, weight, and mechanical configuration of a device — for mobile phones this includes distinctions like candy-bar, clamshell (flip), slide-out keyboard, foldable, and modern all-touch slab. Form factor has direct accessibility…
- Functiona11ity Error(also: Functionality Error, Functiona11ity)
- A term coined by Zhong et al. (2026) — a portmanteau of 'functionality' and 'a11y' (accessibility) — for an accessibility barrier that only manifests through interaction. The static state of the UI appears accessible (elements have labels, sufficient contrast, correct roles),…
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