Glossary

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This glossary covers a wide range of topics and includes terms that describe people, technology, concepts, and more. Some of the terms, marked by this icon , are widely considered to be

This term is generally agreed to be offensive toward or a person or group of people. We strongly recommend you do not use this term and instead use a term not usually thought to be offensive. While it is possible that some people will not be offended by this term, just as some people will be offended by other terms when no harm is intended, it is best to avoid. Remember that what is considered offensive can also change over time, by scenario, and by relationship. We provide this library of terms for informational purposes and we welcome feedback to help us get it right.

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  • Advanced Perceptual Contrast Algorithm

    The Advanced Perceptual Contrast Algorithm (APCA) is a new way to compute contrast based on modern research on...

  • Alternative text

    Alternative text is a textual substitute for non-text content in web pages. Web page authors must provide...

  • Assistive technology

    Assistive technology (AT) can help people who learn and think differently work around their challenges. Assistive...

  • Automated Testing

    Automated accessibility testing tools enable you to audit thousands of documents, web pages, or even multiple...

  • A11y

    A11y is an abbreviation for “accessibility.” This is a numeronym, where the “11” stands for the 11 letters between...

  • Addiction

    According to the American Psychological Association: Addiction is a chronic disorder with biological,...

  • Augmentative and Alternative Communication (AAC)

    Used by persons with speech and language disabilities, Augmentative and Alternative Communication (AAC), utilizes...

  • Anxiety

    A state or feeling of unease.

  • Autism Spectrum Disorder (ASD, Autism)

    A condition that can involve a wide variety of traits, such as difficulties in processing social skills,...

  • Augmentative and Alternative Communication (AAC)

    Devices, methods, systems, gestures, or symbols that supplement or replace oral speech.