Abstract: Access to data resources on data communications networks is simplified by encoding data resource identifiers into a machine-readable printed symbol which can be scanned into a computer-based data communications terminal. The machine-readable printed symbol can be a bar code or in the form obtainable with any other printed encoding technology which encodes digital information in printed form so that it can be electronically read. Once the symbolic representation of the data resource specifier is read into the computer, software running on the computer can use a data resource identifier to access internet resources. Various features are directed to compressing the size of the data resource identifier to fit within a short symbol such as a bar code on a business card.