This chapter introduces the reader to the realm of electronic resource license agreements. It provides the reader with an overview of basic contract law as it relates to electronic resource licensing. The chapter then discusses the electronic resource license negotiation process as well as license agreement term clauses. The aim of this chapter is to provide librarians with an understanding of basic licensing concepts and language in order to aid librarians in the review and negotiation of their own license agreements. The author hopes to impart lessons and tips he has learned in reviewing and negotiating license agreements with a number of publishers to further the awareness and understanding of licensing in the library community.