THE EVALUATION CONSISTED OF A COMPARISON OF RECIDIVISM RATES OF OFFENDERS RELEASED TO COMMUNITY TREATMENT SERVICES (CTS) CENTERS TO THOSE OF OFFENDERS RELEASED IMMEDIATELY ON PAROLE. CTS RECIDIVISM WAS FOUND TO BE A THIRD LOWER THAN THAT OF PAROLE SERVICES, ALTHOUGH MARKED VARIANCES IN EFFECTIVENESS BETWEEN DIFFERENT CENTERS WERE DISCOVERED. SUMMARY FIGURES FOR IN-PROGRAM AND POST-PROGRAM PERFORMANCE ARE INCLUDED. THE DEVELOPMENT OF THE CTS INFORMATION SYSTEM MODEL WAS BASED ON INFORMATION REQUIRED FOR REALISTIC REPORTING OF ACTIVITIES, MANAGEMENT PLANNING AND POLICY, AND INTERNAL EVALUATION. ALSO PRESENTED ARE A SYSTEM DESCRIPTION, PROCEDURES, DATA REQUIREMENTS, AND RELATED FORMS. THE INFORMATION PROCEDURES RECOMMENDED ARE DESIGNED TO BE COMPATIBLE WITH THE EXISTING PENNSYLVANIA BUREAU OF CORRECTIONS INFORMATION SYSTEM TO FACILITATE MONITORING OF THE TOTAL CORRECTIONS SYSTEM.