[berti]

That's applicable for one specific model of ADIRU (basically determines where the aircraft is in 3d space in terms of position, rotation, velocities, and accelerations) from a single manufacturer (Litton). These aircraft have dozens of computers for different functions, many of them with multiple manufacturer options. There are at least 4 different ADIRU makers that airlines have been able to specify at different times including the Litton.

The ELACs (controlling the elevator and aileron actuators according to the demands computed by other functions) are made by Thales specifically for this aircraft type and probably have a quite different design.