Box.

Terms and Abbreviations

UACE	Urban Rural Classification of Urban Areas and Urban Clusters
CBSA	Core Based Statistical Areas
FAR	Frontier and Remote Area Codes
RUCA	Rural-Urban Commuting Area Codes
RUCA(z)	Aging, Independence, and Disability Rural-Urban Commuting Area Codes at the ZIP Code Tabulation Area Level
RUCC	Rural-Urban Continuum Codes
UIC	Urban Influence Codes
NCHS	National Center for Health Statistics Urban-Rural Classification Scheme for Counties
IRR	Index of Relative Rurality
ZCTA	ZIP Code Tabulation Area