A glass cockpit is a cockpit, as used in aircraft and spacecraft, that features an array of electronic (digital) flight instrument displays, typically large LCD screens, rather than traditional analog dials and gauges. While a traditional cockpit relies on numerous mechanical gauges to display information, a glass cockpit uses several multi-function displays and a primary flight display driven by flight management systems that can be adjusted to show flight information as needed. This simplifies aircraft operation and navigation and allows pilots to focus only on the most pertinent information. They are also popular with airlines as they usually eliminate the need for a flight engineer, saving costs. In recent years the technology has also become widely available in small aircraft.