Output signals are served from a serving device to a plurality of browsing devices connected to a network. The output signals represent commands executable by each browsable device so as to display viewable data in accordance with specified page formatting. Requests from browsing clients are identified which contain information relating to the data itself and the display format for the data. The data is read and processed so as to combine a representation of the viewable data with executable instructions. The signals are then supplied to requesting browsing devices, after effectively being assembled as a real time on-line process.