The States surveyed were California, Connecticut, Illinois, Indiana, and Maine. California changed from an indeterminate sentencing system based primarily on offender rehabilitation because of sentencing disparities, arbitrary parole decisionmaking, manipulative behavior by inmates and corrections officials in association with release dates dependent on inmate behavior, the undermining of deterrence effectiveness by sentence uncertainty, and the prison tension created by inmate uncertainty about release. The California determinate sentencing law, which became effective on July 1, 1977, provides narrow ranges which judges must follow in sentencing defendants to prison. General results of determinate sentencing in California have been reduction in sentencing disparity and an increase in imprisonment rates and prison crowding. The other States in the survey changed from indeterminate sentencing for some or all of the reasons that California changed. Results in the other States have included an increase in imprisonment rates and prison crowding, increased focus on plea bargaining as the determining factor in the sentence received, and some improvement in sentencing disparity, although Maine has not seen any impact on disparity. It is too early to determine if determinate sentencing has had an impact on the crime rate. Current determinate sentencing systems are presented in a tabular form for four classes of offenses.