The support of teaching requires material for class readings, and for student papers. In the past, the material for class readings, intended to supplement lectures as prescribed by the instructor, has been called reserves.
In the period before electronic resources became available, the reserves were supplied as actual books or as photocopies of appropriate journal articles. Traditionally, one copy of a book was made available for each 10 students — this is obviously practical for large classes only if paperback copies are available, and the books reused from term to term.
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