Introduction We are living in what is usually described as an 'information society' and as the business community makes ever greater use of computers the courts are going to find that increasingly the disputes before them turn on evidence which has at some stage passed through or been processed by a computer. In order to keep in step with this practice it is vital that the courts are able to take account of such evidence. As the Criminal Law Revision Committee recognised, 'the increasing use of computers by the Post Office, local authorities, ....