They have found that these systems reduce costs, allow staff to be more productive, and provide information that was not previously available. Two basic types of systems are in operation: inmate tracking systems and management and statistical reporting systems. Inmate tracking systems cover booking and release of inmates, cell assignment, movement, and management. Management and statistical reporting systems regularly generate reports to help local administrators operate their jails and to provide detailed information concerning the composition of the jail population. The systems produce four main types of benefits: (1) a reduction in the time officers spend on bookings, (2) the use of shift and daily reports regarding prisoners and their locations, (3) data security, and (4) availability of a manual backup system. System costs range from a few thousand dollars to nearly $250,000. Factors to consider in assessing systems and costs include the availability of hardware, software, and data processing staff and whether timesharing with other county criminal justice officials is possible. Detailed descriptions of the development and operation of five systems in Michigan.