The standard ADIRU on Airbus platforms is provided by Honeywell....
Honeywell (NYSE: HON) announced today that its Air Data Inertial Reference System (ADIRS), which provides navigational data, has become the standard inertial reference system for the Airbus A320, A330/A340 and A380 family of aircraft.
"Three Air Data Inertial Reference Units (ADIRUs) each comprise three ring laser gyros and three quartz accelerometers to accurately sense aircraft position and attitude. By integrating data from the inertial sensors and Global Positioning System (GPS), ADIRS provides automatic initialization, faster align times and 100 percent availability of Required Navigation Performance approaches."
Honeywell's Inertial Navigation System Becomes Standard Equipment On Airbus
Evolve dude...