The interest inventory of the Harrington-O'Shea Career Decision-Making System (T. F. Harrington & A. J. O'Shea, 1980, 1992, 2003) had hit rates of occupational status substantially exceeding chance expectations in the literature's 1st long-term predictive validity study since 1991. No significant gender differences were found for the Grade 10 public school students studied, an age group that commonly takes interest inventories. (Contains 1 table.)