Unaided AAC versus aided AAC

Unaided AAC is communication, other than speech, that does not require any props or devices.  Unaided AAC includes body language, facial expression and the more formal use of manual sign.

Aided AAC is communication, other than speech, that does use props or devices.  Some examples of aided AAC systems are voice output communication aids and communication boards. 

Aided AAC may use electronic or non-electronic aids.  Electronic communication devices may be simple or quite complex.