A computer system comprises an image capture device (10) for capturing an image of a paper document (such as a newspaper article or advertisement) to produce captured image information, and keys or the like for enabling a user to select one of a plurality of options (such as "view" or "order") in relation to that capture information. The system also includes a document database (36) storing image information relating to the contents of a plurality of documents and, for each document, information relating to action which can be taken in relation to that document, and a processor system (30,36) for matching the captured image information with the stored image information for at least one of the documents and determining the respective action information, and for processing the determined action information and the user-selected option to produce a computer instruction as to action to be taken (such as load the newspaper article into the PC's web browser, or "electronically" order the product).