The intended audience includes the Control Terminal Agencies, Federal Service Coordinator regulators, and their respective State, Federal, and local agency users. NCIC is an on- line information service jointly maintained by the FBI and criminal justice agencies throughout the United States. Over 72,000 local, State, and Federal agencies use the NCIC system to record and retrieve information on wanted and missing individuals, stolen property, and criminal histories. The system is now 27 years old and is difficult to maintain and modify; therefore, the FBI with the help of the NCIC Advisory Policy Board planned the upgrade of the current system. The new system, which will be called NCIC 2000, will provide all current NCIC services, plus mug shot, fingerprint, image storage and retrieval, improved data quality and system security, and easier data access. Since NCIC user agencies must comply with the new NCIC 2000 message input formats by March 1998 and the message output formats by July 1995 (excluding images), users should begin planning now for system modification, development, acquisition, and training. This guide identifies areas that may require upgrading as a result of new NCIC 2000 technology and summarizes the benefits of NCIC 2000 services. It describes four generic levels of NCIC 2000 use and the benefits of participation in each of these levels. Further, it identifies NCIC 2000 users, roles, and responsibilities, as well as activities required to revise training and auditing programs. The levels described are for planning purposes only and do not represent the only method for using NCIC 2000 capabilities.