The ABCs of AAC: U is for understand.
Says it all really
The ABCS of AAC: V is for voice.
The ABCs of AAC: O is for organization.
The ABCs of AAC: D is for device. This is where an AAC users voice lives. The device is nothing more than a fancy box unless it is in the hands of the communicator.
The ABCs of AAC: F is for family.