Comparison Chart of AAC devices for academic settings
A nice comparison chart of AAC Assistive Technology Devices for Augmentative Communication in the Academic Setting was developed by the Georgia Project for Assistive Technology, a project of the Georgia Department of Education, Division for Exceptional Students. It was last updated in Jan 2006 and can be accessed at http://www.gpat.org.
They include a well-written disclaimer:
The devices listed on the table above are not meant to be an all inclusive listing of devices within the categories provided. Any exclusion of a specific device was not intentional. The features designated for the devices are meant to indicate that the device has the capacity to provide that feature and the feature may be dependent upon external accessories or specific software programs (i.e., switch interfaces, etc.). A good faith effort has been made to verify the information contained in this table; however, if errors have been made related to the features of specific devices they are not intentional. Individuals are encouraged to explore each device in order to verify that it contains all of the features needed for their specific students.
The site also has charts related to:
AT Devices for AAC - Preschool
AT Devices for Math
AT Devices for Reading
AT Devices for Study and Organizational Skills
AT Devices for Writing