The Prentke Romich Company of Wooster, Ohio manufactures the Liberator and other communication and environmental control devices. They have an ambassador program in which their customers go with representatives to various conferences and meetings to demonstrate their products. I'm a part of this program and I get to travel all around Ohio, Pennsylvania and Michigan. The Liberator operates under a system called Minspeak. Minspeak uses icons to which the user assigns meanings.
Icons can have multiple meanings and can be combined in sequences.
Semantic Compaction System developed Minspeak. On the Semantic Compaction Systems page they have my speech that I presented at the 1996 Minspeak Conference. If you want to see examples of Minspeak in action click on the Shakespeare icon below. The purpose of the AAC-RERC is to improve technologies that further the development of communication, language, natural speech, discourse skills, and literacy of persons with significant communication disorders. Our guiding principle is that all AAC stakeholders must be equal partners in the design, implementation, and dissemination of the project activities.