This paper summarizes and critically surveys research on hyperinflation. Appraisal and review of the literature considers the origins, development, termination, and the lessons to be learned from hyperinflations. The historical evidence as well as the econometric evidence is analyzed. It is concluded that while the lessons to be learned from such episodes perhaps have been overstated a number of useful implications may be derived from studying hyperinflations, such as an understanding of the forces which link monetary and fiscal policies to inflation, and policy makers' role in influencing individuals' expectations.