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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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  • Mute

    Derogatory term for a person who doesn't use verbal speech, often referring to people who are deaf or hard of...

  • Cripple, Crippled

    Derogatory term for a person that has a disability or impairment, usually referring to someone who has limited or...

  • Freak

    Derogatory term for a person that appears to have unusual characteristics.

  • Advanced Perceptual Contrast Algorithm

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

  • Backward

    Derogatory term for a person that is perceived to be making less intellectual progress or developing more slowly.

  • Hard of Hearing (HoH)

    Description most commonly used for someone who does not hear well, with some degree of hearing loss.

  • PEAT (Photosensitive Epilepsy Analysis Tool)

    PEAT, also known as Photosensitive Epilepsy Analysis Tool, is used to prevent content that can cause seizures. It...

  • Reasonable Accommodation

    Any change to the environment, equipment, processes, or practices that improves accessibility or helps an...

  • Augmentative and Alternative Communication (AAC)

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

  • Yahoo

    Derogatory term for a person that is perceived as unintelligent, unrefined, or uncultured.