Should the Library of Congress (LC) jettison Library of Congress Subject Headings (LCSH), the longstanding professional taxonomy? That’s one of the provocative suggestions in a new report released last month by LC. “The Changing Nature of the Catalog and Its Integration with Other Discovery Tools,” commissioned by LC and written by associate university librarian Karen Calhoun of Cornell University, was making waves weeks earlier, thanks to a critical review of a draft of her paper, written for AFSCME 2910, the LC Professional Guild, by Thomas Mann (author of The Oxford Guide to Library Research). It warned of “serious negative consequences for the capacity of research libraries to promote scholarly research.”