The Micro-TOWER System of Vocational Evaluation includes work samples for assessing vocational skills, presentations of occupational information, behavioral observations, and group discussions focusing on vocational goals and related concerns. It has been field tested on over 1,200 persons at eighteen sites, including rehabilitation facilities, psychiatric hospitals, correctional facilities, and a school for the mentally retarded. Thirteen work sample tests are designed to measure five skill areas: Verbal (Want Ads Comprehension, Message Taking), Numerical (Payroll) Computation, Making Change), Motor (Bottle Capping, Packing, Electronic Connector Assembly, Lamp Assembly), Spatial (Blueprint Reading, Graphics Illustration), and Clerical Perception (Mail Sorting, Filing, Zip Coding, Record Checking). This report presents data comparing the performance of a variety of special disability groups to the performance of the general rehabilitation group, which includes all of the individuals who participated in the field testing. Performance data are summarized for groups of the physically disabled, emotionally disturbed, educable mentally retarded, brain-injured, adult offenders, ex-alcoholics, Spanish-speaking, visually handicapped, and deaf. (Author/BW)