Abstract: We describe a method of activating functionality of an item of software installed on a mobile device, the method comprising: installing said software on said mobile device, wherein said installing includes registering in an operating system of said mobile device a link between an application URI scheme and said software such that a URI having said application URI scheme will be passed to said installed software for processing; scanning a code into said mobile device, wherein said code includes a code URI comprising said application URI scheme and activation data for said item of software; interpreting said application scheme of said code URI using said registered link to pass said code URI to said installed software; and processing said code URI using said installed software to activate a function of said item of software using said activation data in said code URI.

Abstract: A remote computer having a processor and a display, said remote computer being connected via a network to a local computer having a processor and a display, wherein the processor of the remote computer is configured to divide at least part of the remote computer display into a grid having a plurality of tiles, determine whether each tile represents image data or text data, encode each tile representing text data using a lossless compression, encode each tile representing image data using a lossy compression, and transmit display data comprising said lossy encoded image data and said lossless encoded text data from said remote computer to said local computer, whereby a user is able to view said remote computer display on said local computer display.

Abstract: A touch screen device configured to implement an auxiliary virtual keyboard on a touch screen, the device having touch/gesture sensing and image display functions, a processor, and memory storing control code and data defining the keyboard comprising a set of keys and a key layout map. The processor is configured to determine a size of a window in which the keyboard is to be displayed as a strip of keys; send instructions to display a partial view of the keyboard within the window so that a subset of keys are displayed, whereby the keyboard is scrollable in response to user input to alter the partial view to display a different subset of keys; receive touch data; map said touch data to a key using the key layout map to identify a touched key; and provide a response dependent on the identified touched key.