In the 1890s, the library developed the Library of Congress Classification System. It is still used today to predictably manage millions of items in libraries worldwide. Catalogs, cards and computers ...

They've just used a game called Within Range to ... teach the Dewey Decimal System. [Update: It's the Library of Congress classification system.

Object Details Author Library of Congress Subject Cataloging Division Notes "The additions and changes in Class Q, adopted while this work was in press will be cumulated and printed in List 234 of LC ...