Airbus used similar handling, procedure and cabin layout characteristics on the A380 to those of the company's other aircraft to reduce crew training costs; Accordingly, the cabin is similar to that of other Airbus aircraft, although several improvements have been incorporated. The A380 features an advanced glass cockpit and new fly-by-wire flight controls with side control stick. It has eight 15 × 20 cm liquid crystal screens, practically identical and interchangeable; These comprise two main flight screens, two navigation screens, an engine parameter screen, a system screen and two multifunction displays (MFD). The MFDs are new to the A380 and provide an easy-to-use interface to the flight management system by replacing three multi-function display and control units. QWERTY keyboards and trackballs are included in the cabin to interact with a graphical display navigation system. In general, the cabin is more spacious than its counterparts on other wide-body aircraft.