The National Crime Information Center (NCIC) is a database that contains information on criminals and criminal activity.
The CJIS system is a set of databases that includes the NCIC, along with other databases containing information on fingerprints, wanted persons, missing persons, and stolen property.
While the NCIC database can be accessed by any state law enforcement authorities, the CJIS network is only accessible to agencies that have been granted access by the FBI.