525	LIBRARY AND ARCHIVAL EQUIPMENT, MACHINES, AND SUPPLIES
52505  *	Archival Storage Materials (Acid Free): Document Cases, Envelopes, File Folders, etc.
52510  *	Binders, Covers, Jackets, Protectors, Sticks, etc. (For Books, Magazines, Newspapers, Pamphlets, Photographs, etc.)
52520  *	Book Cards, Date Slips, Pockets, Protectors, etc.
52525  *	Book Ends, Holders, Supports, etc.
52530  *	Book Mending, Rebinding, and Repairing Supplies
52540  *	Book Security Systems, Equipment, and Supplies
52550  *	Books, Accession
52555  *	Daters, Pencil and Band Type; and Supplies
52560  *	Library Catalog Cards and Accessories: Cards, Guides, Protectors, Sorters, Trays, etc.
52565  *	Library Forms, All Kinds: Circulation Record, Continuous, Strip, etc.
52570  *	Library Labeling Supplies: Labels, Letters, Signals, etc.
52575  *	Library Machines: Card Duplicators, Card Master Machines, Charging Machines, Pasting Machines, etc.
52580  *	Library Supplies, Miscellaneous