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Glossary

Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.

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LLM(also: Large Language Model)
A large neural network trained on enormous volumes of text (and often code and images) to predict and generate natural language. Modern LLMs such as GPT-5, Claude, and Gemini can follow instructions, reason step-by-step, use tools, and — in multimodal variants — interpret images…
LLM Agent(also: Generative Agent, Task-Executing Agent)
A software system built around a large language model that autonomously perceives state, plans actions, executes them against an environment (a web page, a mobile app, a shell, a UI), and reflects on outcomes to make progress toward a goal. In accessibility work, LLM agents are…

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