Abstract - A brief summary that gives the essential points of the contents of a book, pamphlet, article, etc.
Collocation refers to arranging materials on a similar topic together.
Catalog - A catalog is a collection of bibliographic records for the materials a library owns. It may be in card or computer format. C D ROMS - Compact Disc Read Only Memory introduced in 1985. Information on one CD ROM may equal about 300,000 pages of print information. Circulation - The checking in and checking out of items from the library collection.