ISBN stands for International Standard Book Number. It is a code assigned to every published book that uniquely identifies it in the marketplace. ISBNs make it easier and more efficient for libraries, booksellers and others in the publishing industry to order, distribute and catalog book.

Pre-note: In this article, teleclass is an example used to illustrate one type of eLearning market. The tips work the same for other eLearning programs, including, but not limited to, teleseminars and ecourses.