Initially administered in 1961, the Career Maturity Inventory (CMI) was the first paper-and-pencil measure of vocational development. The present research revised the CMI to reestablish its usefulness as a succinct, reliable, and valid measure of career choice readiness, with a few theoretically relevant and practically useful content scales for diagnostic work with school populations up to and including Grade 12. The new Form C was produced by combining rational organization of item content with confirmatory factor analysis (CFA). In the end, CMI Form C provides a total score for career choice readiness, three scale scores reflecting career adaptability dimensions of concern, curiosity, and confidence, and a score reflecting relational style in forming occupational choices. Initial evidence supports the face, construct, and concurrent validity of the CMI scores as indicators of career choice readiness. (Contains 3 tables and 2 figures.)