Customers buy ebooks online and the book file is download into their computers.
Customers view the book on their monitor or print it out on their personal printers. PoD books are stored in an electronic database. When customers buy them they are printed out and bound one at a time. The printed book is then shipped to the customer. Some bookstores are installing PoD presses on the premises so that the book can be ordered, printed, and picked up at the store.