This book is unique within the field of augmentative and alternative communication with its basis in modern developmental theories of language and communication, its practical approach with many examples and focus on every-day situations, and its coherent and readable text. It may serve as an introductory text book for speech and language therapists, teachers in school and preschool, psychologists and care nurses, as well as a source of information for families with members who have severe developmental speech and language disorders.