Augmentative and Alternative Communication (AAC) was a controversy between the specialists themselves and between the specialists and the parents about the benefits of its usage. The parents were always concerned that using the (AAC) would prevent their children"s language development and lead to their dependence on it. In this research, the author studied the effect of (AAC) on communication, social interaction, and cognitive ability. In Chapter 4, the author investigated the impact of IQ (Intellectual Quotient) on using the high-tech (AAC). At the last part, many issues related the (AAC) have been discussed.