Today I had librarian duty at lunch. My group and I were a little late due to the kids can cook program. But the head librarian said that it was fine.
When we got there we put the last little books away and started up at the desk we issued some books and returned some book.How you issue books
You scan the barcode of the person who wants to issue something in the book with all the barcodes
You scan the barcode on the book
You stamp the book (the stamp has the date the book needs to be returned)
You hand the book to the person nicely.