The National Justice Agency List is a master name and address file created and maintained by the Census Bureau for the Bureau of Justice Statistics. The file was first created in 1970 and the Census Bureau has continued to maintain and expand the file. The master file contains information for ten separate sectors: Prosecution and Civil Attorney Sector, Public Defender Sector Law Enforcement Sector, Court Sector, Probation and Parole Sector, Juvenile Corrections Sector, Local Adult Corrections Sector, State Adult Corrections Sector, Other Justice Agencies Sector, and Federal and Indian Tribal Sector. The ICPSR has separated the master file into ten subfiles, corresponding to the ten sectors in the master file. Every file has variables containing the names and addresses of agencies in that sector and information relevant only to the agencies within the sector. The original survey of criminal justice agencies was conducted in January of 1970 by the United States Census Bureau. Each county in the United States and each municipality and township with a 1960 population of 1,000 or more persons was surveyed to identify the names and addresses of the criminal justice agencies and institutions controlled by local government.