Faye Abdellah developed a typology of 21 nursing problems in 1960 to promote professionalism in nursing. The problems cover areas like hygiene, activity, nutrition, elimination, and communication. Abdellah viewed nursing as a problem-solving process where the nurse identifies issues and takes action. She believed this typology could be used as a framework to guide nursing care. Abdellah later refined her views and linked the typology to four nursing concepts - the person receiving care, their environment, their health needs, and the role of the nurse.