The Information System for Vocational Decisions (ISVD) helps a person make decisions in choosing a vocation by collecting and processing data which include the following areas of information: college, career, military service, family, and the user's responses. It is vital that the machine be made to understand English--the natural language of the user. Of the several computer programs that are designed to do this, ELIZA met the needs of this system. By "recognizing" key words and "decomposing" what the user says, it can analyze the sentence and thereby understand it. It is the user that makes the decision, not the machine. The machine relentlessly displays all the relevant facts (as far as is possible) so that the user is guided to consider them in his decision making, even if it means doubting a preconceived purpose. The user is provided with opportunities to analyze and harmonize disconnected sections in his vocational development. The ISVD data are somewhat like ERIC abstracts. There is a full report of the Harvard Project, and five appendices provide information relevant to the project. (MM/GO)