This is a working paper which seeks to examine how information about approximately 900 occupations might be utilized and kept up to date. The discussion centers on a modular system for information treatment. The paper elaborates on: (1) how and what kinds of information will be put into the system; and (2) five different modes of operation for getting information out of the system. These latter include: (1) recall by occupation, industry, or trait; (2) selection by trait; (3) selection by multiple traits; (4) selection by scoring and evaluation; and (5) planning to implement vocational decisions. Inquirer/system interactions for each mode are specified. The components and structure of the proposed information system are discussed, and diagrams included. The author concludes by listing several subsequent steps which need to be taken toward the goal of making such a system optimally usable. (TL)