The Nursing Interventions Classification (NIC) is a care classification system which describes the activities that nurses perform as a part of the planning phase of the nursing process associated with the creation of a nursing care plan. The NIC provides a four level hierarchy whose first two levels consists of a list of 433 different interventions, each with a definition in general terms, and then the ground-level list of a variable number of specific activities a nurse could perform to complete the intervention. The second two levels form a taxonomy in which each intervention is grouped into 27 classes, and each class is grouped into six domains. An intent of this structure is to make it easier for a nurse to select an intervention for the situation, and to use a computer to describe the intervention in terms of standardized labels for classes and domains. Another intent is in each case to make it easy to use a Nursing Minimum Data Set (NMDS). The terminology is an American Nurses' Association–recognized terminology, which is included in the UMLS, and is HL7 registered.