This handbook provides an introduction to the use of vocational assessment instruments and an overview of 69 vocational assessment instruments. Vocational assessment guidelines offer suggestions for planning and implementing a vocational assessment program that emphasizes objective data. Topics covered include defining the goals and population, instrument selection and use, administration, scoring, and interpretation. A discussion of standardizing assessment results follows. Appendixes to these sections include a list of interest areas and work groups, interest inventory translations to work groups, conversion charts and worksheets, a vocational interview form, and a work motivators checklist. The reviews of the vocational interest and ability assessment instruments are arranged in alphabetical order by title. Each one-page review provides this information: title, copyright, vendor, type/use of instrument, target population, instrument format, scoring, interpretive format, reading level, and administrative time. A space is provided at the end of each review for notes, and blank review sheets are included. An assessment review chart identifies the major factors of the instruments included in the manual. A list of the instrument vendors with the corresponding assessments they supply is appended. (YLB)