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EFIS-equipped airplanes are frequently referred to as having Glass Cockpit , a slang reference to the TV-style displays.

In adition to the display units (DU) a complete system will include symbol genetators to drive the displays and various data sources including an attitude and heading reference system (ahrs) and Air Data Computer (which may be combined in a single box). There will also be navigation inputs such as Gps scanning distance measuring equipment (DME) or Inertial Guidance System