Abstract: This invention relates to a system (10) for controlling the display of a user interface of a software application. The system (10) includes an application server (14.1) for executing, upon request, at least one software application and display export means for exporting a user interface display of the at least one software application over a communications network. The system (10) also includes a client terminal (12.2) having a communication interface connected to the communication network, for receiving the user interface display, and a display means for displaying the user interface display. The system (10) also includes transfer means for transferring the user interface display from a first client terminal (12.2) to a second client terminal (12.3) without interrupting the operation of the at least one software application. The invention extends to a method of controlling the display of a user interface of a software application.