An aid server (AS) comprises a processing module (PM) which stores a user identifier (UID) and an identifier (SID) of a stage of an application of the virtual office type, said identifiers being retrieved from a request sent by the terminal and designating an action need by the user. The request (REQt) is sent to a respective application implemented in at least one server (VOS.sub.i) which executes the needed action and develops an answer sent to the aid server. A suggestion module (AM) analyzes...

In a succession of rotor disks, only the end disks are connected to a main structure by bolted extensions and the intermediate disks are suspended from rigid spacer pieces by centering and anti-rotation connections. The end disks are interconnected to clamp the assembly in the axial direction. There is no bolted connection between the successive disks. Assembly is very easy. The disks and the spacer pieces are stacked together in alternately, and the assembly is torsionally very rigid because of...

A key and lock device comprises a key having a first electronic circuit and a lock having a second electronic circuit. The key and the lock store secret information, some of which is unique for each device. The key and the lock exchange a random number through connectors and perform a calculation in the respective circuitry based on the random number and secret information. An electrical blocking mechanism is moved to a non-blocking position if a comparison of the calculations in the circuits gi...