TO BEST MEET THE REQUIREMENTS OF ITS IDENTIFICATION SECTION, THE CHICAGO POLICE DEPARTMENT HAS A COMPUTER SYSTEM DESIGNED IN WHICH SEVEN TERMINAL SITES ARE HARDWIRED TO HAVE SIMUL-REAL-TIME ACCESS TO A FOUR-PHASE SYSTEM IV/90. THE PRIMARY SEARCH TECHNIQUE INVOLVES THE USE OF THE 'SOUNDEX' SYSTEM TO TRY FOR A 'HIT' IN THE FILE USING AN ARRESTED PERSON'S NAME. SEARCHES MAY ALSO BE MADE BY FINGERPRINT CODE (EITHER THE FULL CODE OR THE PRIMARY AND SECONDARY CLASSIFICATION), SEX, RACE, AND BIRTHDATE. WHEN A SEARCH RESULTS IN A 'HIT,' THE TERMINAL OPERATOR CAN REQUEST THE COMPUTER TO PROVIDE A MASTER-RECORD DISPLAY. FOR SECURITY PURPOSES, PHYSICAL ACCESS TO THE TERMINALS IS CONTROLLED, AND A BUILT-IN, FOUR-LEVEL SECURITY SYSTEM RESTRICTS DATA ACCESS TO AUTHORIZED PERSONNEL. A DETAILED AUDIT TRAIL IS PRODUCED WHENEVER THE FACILITY IS USED. HARD-COPY DAILY REPORTS ARE GENERATED TO INFORM SUPERVISORY PERSONNEL OF ANY RECORD MODIFICATIONS MADE THE PREVIOUS DAY. (RCB)