Abstract: The invention provides a user input mechanism for reordering of items displayed on a display in which the user is focused on item order, not item position as in the case of a drag and drop operation. The user selects one or more GUI elements displayed on a display of a data processing device in a desired order, where the time between each adjacent selected GUI element is less than a threshold time. Upon detection that no further selection has been made within the threshold time, the data processing device interprets the user as having completed their selection. At this point the selected one or more GUI elements are reordered based on the order that they were selected by the user, with any unselected GUI elements being placed before or after the reordered GUI elements as appropriate. The user is now free to make further selections if necessary.

Abstract: A computer-implemented method for integrity control of a financial transaction application is provided. The financial transaction application is associated with an authorizer, for providing a corresponding authorization response to an authorization request. There is also a validation application, associated with an integrity controller for generating an expected authorization response to the forwarded authorization request. An application integrity detector is provided for determining a degree of similarity between the forwarded authorization response and the expected authorization request. By providing the validation application, the integrity controller may regularly check for acceptable operation. The lowest degree of similarity that is considered acceptable may be determined by the integrity controller, considering parameters such as how the validation application is being used.