Some airlines resort to very innovative practices. Many airlines these days work with aircraft manufacturers, but airlines such as AirAsia goes a step further, working with airports to develop specially designed low-cost terminals that require far less overhead. Lower costs are passed on to the airline, and in turn to the customer. Ryanair generally make the airports accept their boarding passes which passengers print themselves, although at some airports (where Ryanair is not dominating) passengers have to replace it with a normal boarding pass from the airport. Other practices that reduce expenses are the use of UAVs for aircraft checkups, tablet PCs instead of logs on paper (reduces airplane weight), and smartglasses for the pilot.