An Information System for Vocational Decisions (ISVD) is described and discussed. The system is intended to accommodate, in potential, the vocational needs of users extending from kindergarten to retirement. With ISVD, occupational facts/data can be converted into vocational information by means of personal inquiry which is at least initially conducted under supervision of a professional counselor. Two major goals of ISVD subsume much of what is elaborated throughout the paper: (1) to bring a person to a condition of readiness and confidence at each of the several discontinuities of vocational development; and (2) to permit the accumulation of data about vocational decision-making, as experienced and undertaken by the individual. The author recapitulates the line of thinking which has led him to his current beliefs about vocational development. For the rest, he discusses the organization and functional intention of ISVD, its machine routines, and some of its materials. Finally, he considers the existence of ISVD in relation to problems of vocational readiness and placement of college students. (TL)