The Augmentative and Alternative Communication (usually abbreviated as A.A.C.) is the term that describes all the communication methods that help people with difficulty in using the most common communication channels, above all language and writing, to communicate better.

It is called an alternative because it uses alternative methods of communication that are different from the traditional ones. It is defined as augmentative because it does not substitute but increases the natural communication possibilities of the person.

It is a set of techniques, strategies and technologies aimed at the non-speaker, his interlocutors and his living environment with the aim of facilitating communication and improving participation in contexts of life and relationships.

 There are many different technical approaches. It is necessary to choose and apply the most correct and effective approach to the needs and characteristics of the single non-speaker subject (age, basic pathology, residual communication skills, visual skills, etc.).