Interactive systems respond to instructions from users fast enough to allow transactions to be completed almost immediately. While the precise structure of the future interactive systems is not yet clear, many directions of growth seem apparent. The current designs and organisation of databases obviate the need to duplicate information in order to meet the various requirements of different groups of users, thus ensuring that the data always remain consistent. Additionally, the use of relational databases enable the Internet users a number of essential services; including data transfer, electronic mail and the ability to access information in remote databases. Integrated systems, therefore, are connected services making it possible for users to communicate with each other anywhere on the network. The safe running of systems needs to keep information protected from harm, theft, vandalism, fraud and invasion of privacy, which means continuous security development of software and hardware devices.