Each major cluster formed by the worker trait groups in the Third Edition (1965) of the Dictionary of Occupational Titles (DOT), was used to define an interest scale for the Ohio Vocational Interest Survey (OVIS). The OVIS scales regrouped the nine levels described by the DOT for the data, people, and things dimensions of work into three levels--low, average, and high. The OVIS and DOT relationships are grouped into cubes and subdivided into cells. The OVIS items are brief statements of activities in the cluster of jobs representing an OVIS scale. The reliability is high and the items are valid to the extent that the DOT listings are valid. Norms differ slightly for males and females. The OVIS is adaptable to a computerized system of vocational information based on the DOT and designed to teach decision-making and to facilitate vocational exploration. (Author/EK)