The authors describe the implementation of the Nursing Interventions Classification (NIC), a standardized nursing language in five test sites: Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire; Genesis Medical Center, Davenport, Iowa; Loyola University Medical Center, Maywood, Illinois; Oaknoll Retirement Residence, Iowa City, Iowa; and The University of Iowa Hospitals and Clinics, Iowa City, Iowa. A description of NIC is provided along with a discussion of implementation issues and recommendations for implementation.