1. A method of controlling application devices ( 103 - 106 , 203 , 204 , 305 , 405 , 408 - 412 ) said method comprising the steps of: retrieving first documents ( 501 ) from a first set of application devices by a server ( 107 , 205 , 304 , 404 ); retrieving identification ( 115 , 502 ) of a user by the server; characterized in that the method further comprises the steps of: generating ( 505 ) second documents by the server, each comprising an instruction, on the basis of at least a part of the retrieved identification of the user and at least a part of the first documents; sending ( 506 ) at least one of the second documents to each device of a second set of the application devices by the server; and performing ( 507 ), for a given device of the second set, one instruction from at least one of the second documents received in the given device.