This book reports the work of the authors and nineteen other outstanding leaders who bring together in this volume the principles of occupational therapy. The book points out that principles of occupational therapy have been utilized for centuries in the management of the care of patients. In modern times its value was recognized in World War I, but there was little carryover from the military to civilian hospitals. Great strides were made during World War II, and the importance of its activities in the dynamic program of rehabilitation has made it one of the most talked about subjects in medical service. The development of interest in physical medicine, which includes both occupational and physical therapy, has given further stimulus to training and practice in this field. The authors point out that occupational therapy as a method of treatment can do much to shorten convalescence and improve the degree of recovery.