1. Device for controlling the switching of a user interface ( 110 ) to a plurality of computers ( 120 , 130 , 150 ), said user interface including display means ( 111 ) and at least one input peripheral ( 112 ), and being interconnected with said plurality of computers via a switch ( 165 ), the device being characterised in that it includes: a memory ( 225 ) for storing a list of identifiers, each identifier identifying a application available on one of said computers; a graphical interface ( 220 ) for generating a window including a menu, said menu containing the list of applications the identifiers of which are stored in said memory; control means ( 250 ) adapted to receiving a selection command identifying an application selected from said list by at least said input peripheral and to transmitting to said switch an order for switching said interface to the corresponding inputs/outputs of the computer hosting said selected application.