Anglo-American Cataloguing Rules
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The Anglo-American Cataloguing Rules (AACR) are the standard by which the old, fusty paper cards in drawers in libraries were written. Designed to condense the relevant data of a book down to what would fit on a card when manually typed on it, these standards called for a number of obscure abbreviations, some in Latin. The format is part of the larger standard of MARC (Machine Readable Cataloging). It was desperately in need of an update for the digital age, and this came in the form of its successor, Resource Description and Access (RDA).
