There are two types of ACDs. Unaided ACD do not require physical aids or tools. Examples might include facial expressions, body language, gestures, and sign language. Aided ACD uses tools or materials, separate from the individual, to communicate (Assistiveware, 2023). Within these categories, Aided ACD can be classified into low, medium, and high grade technology depending on the type of device. Although this section contains a myriad of AACs, it is not an exhaustive list. If you find a device you know of is not present here, contact us.