(verb) Use "check out", not "checkout" or "issue".
circulation
циркуляция, обмен, абонемент, оборот+, движение, обращение; 1. выдача книг по абонементу; книговыдача; 2. обращаемость, распространение книги; 3. полигр. тираж; (the process of checking books and other materials in and out of a library. Also refers to the total number of items checked out by library borrowers over a designated period of time and to the number of times a given item is checked out during a fixed period of time, usually one year. In public libraries, low circulation is an important criterion for weeding items from the collection. Books for which circulation is anticipated to be high may be ordered in multiple copies to satisfy demand or given a more durable binding to withstand heavy use. Some online circulation systems provide circulation statistics by classification and material type for use in collection development. Circulation is a fundamental to access services. Abbreviated circ.)
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