Abstract: To provide a visual representation of a sub-set of a visual program generated using a visual programming tool, wherein a trace operation is executed against the visual program and resulting trace data is stored in a trace file, an apparatus includes a parser for parsing the trace file to obtain the trace data, and a generator for using event data associated with an event and associated component data associated with a component of the visual program to generate render data. The event data and the component data are associated with the trace data.

Abstract: To provide a visual representation of a sub-set of a visual program generated using a visual programming tool, wherein a trace operation is executed against the visual program and resulting trace data is stored in a trace file, an apparatus includes a parser for parsing the trace file to obtain the trace data, and a generator for using event data associated with an event and associated component data associated with a component of the visual program to generate render data. The event data and the component data are associated with the trace data.

Abstract: A distributed communications network comprising a plurality of nodes and a plurality of user devices, wherein each node comprises: a communications device for establishing bi-directional wireless communication with at least one user device, a communications device for establishing bi-directional communication with at least one other node; and a data processor in association with a local memory for storing information for presentation to users, and wherein at least one of the nodes further includes a communications device connected to a further communications network, and wherein nodes are grouped into clusters that cooperate with one another such that if a user requests information which is held in the local memory of a node within a cluster then the nodes cooperate to supply that information to the user and if a connection between a user and the further communications network is required, the nodes cooperate to establish it.

Abstract: A method and device for communication, in which a random code is used in the communication. The method comprises storing a random code in a first device; storing the random code in a second device; and using the random code in a subsequent communication. The invention may be employed in a financial transaction. That is, the random codes may be used either as keys to endorse payment instructions with a digital signature; or as “virtual cash”, in which case the codes themselves are transmitted between the parties. Another application of the invention is in transferring confidential information by a “one time pad” security technique, in which a random list of numbers is used to encode the character code for a symbol, by a simple numerical operation.

Abstract: An information system is provided for transmitting data into a local area surrounding the transmitter. The transmitter may be used to provide information to pedestrians, or to passing road traffic. Data is stored in a local memory 64 associated with the transmitter such that data stored in the memory can be repeatedly and frequently transmitted to users 70 having suitable reception apparatus 18 in the vicinity of the transmitter.