This X12 Transaction Set contains the format and establishes the data contents of the Educational Course Inventory Transaction Set (188) for use within the context of an Electronic Data Interchange (EDI) environment. This transaction set can be used by schools and school districts and by postsecondary educational institutions to request and to transmit information about educational courses that are currently being offered or that have been offered in the past by the school, school district or postsecondary institution.