A library card is a small, usually plastic or paper card that serves as identification for borrowing books and other materials from a public or academic library. It typically bears the patron's name, barcode, and sometimes their photo, and may also include additional features such as a magnetic strip or RFID chip to facilitate automated transactions at the circulation desk. The card allows patrons to check out books and other materials from the library for a specified period of time, after which they must be returned in order to borrow more items. Library cards are often free and can be obtained by filling out an application form with personal information and proof of address or identification.