National Agriculture Imagery Program - United States Department of Agriculture (GIS)
National Assault on Illiteracy Program (EA)
National Association of Independent Publishers (EA)
National Association of Industrial Parks - Later, NAIOP
National Association of Inpatient Physicians (EA)
National Association of Insured Persons - Defunct (EA)
National Association of Investment Professionals (EA)
Neuronal Apoptosis Inhibitory Protein - Genetics
Neuronal Apoptpsos Inhibitory Protein - Cytology