747-400 Fly By Wire?

[777300ER]

Recently while reading through a Boeing document which detailed the differences between the older generation 747s to the 747-400 I noticed that Boeing claims the 400 incorporates Fly By Wire technology. My understanding of the Flight Control system on the 400 is that Elevator and Aileron systems are connected mechanically to actuators.

Is the 747-400 Fly By Wire? If so, what part of the Flt Control system utilizes this technology?

Thanks.