The purpose of this handbook is to bring together information on the special devices and associated systems which have been developed to assist the handicapped in living and vocational pursuits and in clinical use. This unique work places emphasis on the devices and systems plus includes sufficient background information to clarify the objectives and use. The general subject matter is divided into two major areas. The first area deals primarily with the environment of the handicapped. The second section deals with devices for personal assist systems-such as for testing, evaluation, and training-and devices which provide individualized support. The information in this comprehensive handbook will assist those working directly in the broad field of rehabilitation of the handicapped and also those associated with the subject matter in a peripheral way, including counseling and vocational evaluation.