All patrons with a Harvard Library borrowing account may use the Harvard Library checkout app to check out items from Cabot Science, Tozzer, and Countway Libraries and the Biblioteca Berenson The app will automatically recognize your library location. Download the app to your phone, open the app and login with your with your Harvard ID number (located on the front of your Harvard ID or Harvard Library borrower card) and use your phone’s camera to take pictures of the barcodes on the items you w