The Riverview public library needs to store data related to what books it has and where the books are at any time. Book borrowers can borrow up to four books at any given time. Several copies of the same book are held for books which are in demand. A specific copy of a book may be borrowed multiple times. Each time a copy of a book is borrowed, a transaction is created. Borrowers may also make reservations for titles which are out on loan. Items which need to be stored include borrower number, borrower name, borrower address, date borrowed, date due, date returned, ISBN, copy number, acquisition date (when a book is purchased), title, author, publisher, borrower making reservation, reservation number, and date reserved.