This guide for potential purchasers of vocational evaluation systems begins with an edited reprint of an article on how to select a commercial vocational evaluation system. Section 2 explains the 15 major points contained in the outline of each system. They are development, organization, physical aspects, work evaluation process, administration, scoring and norms, observation of clients, reporting, utility, training in the system, technical considerations, reviewer's summary and comments, address, cost, and references. Section 3 is a table presenting a very brief comparison of the systems on the first 10 points in the outline. The fourth section contains a more detailed description of 17 vocational evaluation systems: Career Evaluation System, McCarron-Dial Work Evaluation System, Micro-TOWER, Occupational Assessment/Evaluation System, Philadelphia Jewish Employment and Vocational Service Work Sample System, Prep Work Sample, Pre-Vocational Readiness Battery, System for Assessment and Group Evaluation, Talent Assessment Programs, The TOWER System, Valpar Component Work Sample Series, Vocational Evaluation System by Singer, Vocational Information and Evaluation Work Samples, Vocational Interest Temperament and Aptitude System, Vocational Skills Assessment and Development Program, Wide Range Employability Sample Test, and Work Skill Development Package. (YLB)