This document provides an overview of hematopoietic stem cell transplantation (HSCT). It discusses the history and development of HSCT, the types of transplants including autologous and allogeneic, stem cell sources, the transplant process from collection and storage to conditioning and infusion, complications, and management considerations. Key events in the history of HSCT are highlighted, such as the first successful transplant between identical twins in 1956 and advances that enabled unrelated donor transplants.