The document discusses collection development in libraries. It defines a library collection and notes that collection development is an important process for increasing materials and satisfying user needs. The purpose of collection development is to select useful materials for readers, provide new information, and periodically review and withdraw outdated items. Collection development occurs in public, academic, and special libraries, and involves selecting materials based on criteria like the user community and budget. A collection development policy outlines the goals, selection process, and helps ensure appropriate spending.