Thoughts for Caregivers About Augmentative and Alternative Communication AAC 101 Augmentative and Alternative Communication (AAC) provides a way for individuals with little intelligible speech to communicate. Low technology AAC is the use of pictures, gestures, or writing. High technology AAC is the use of a computerized device with voice output. Who Can Use AAC? AAC can benefit a wide range of individuals from the beginning communicator to advanced communicators, children, a