In this journal issue six short articles concerning copyright law and practice are teamed with twelve others about cooperative experiences in Illinois libraries. The doctrine of "fair use," which limits the copyright owner's exclusive rights, is the subject of perspectives by an educational media publishing company and a library. The implications of copyright law revision on photocopying practice, the proposed new copyright law, and two bibliographies are discussed in the remaining copyright articles. Case reports of a variety of in- and between-school library programs, a discussion of the Illinois Library and Information Network (ILLINET), a description of a school-community library planned jointly by a school board and public library, plus reports from a media center and a public library constitute the articles illustrating library cooperation. (KB)