Augmentative and Alternative Communication (AAC) refers to methods and tools that help individuals with communication challenges express themselves. This can include anything from simple picture boards to advanced speech-generating devices. AAC is often used by people with conditions such as autism, cerebral palsy, or stroke that affect their ability to speak. AAC can be categorized into two main types: augmentative communication, which supports existing speech, and alternative communication, which replaces speech entirely. These systems can be tailored to meet individual needs, allowing users to communicate effectively in various settings, such as at home, school, or work.