INTRODUCTION

Different types of system development methodologies are used in designing information system. Depending upon the actual requirement of the system, different approaches for data processing are adopted. However, some system groups recommend a centralized data processing system while others may go in for a distributed data processing system. In a centralized data processing, one or more centralized computers are used for processing and the retrieval of information is done from them. The distributed processing system involves a number of computers located remotely in the branches/ departments of the organization. The client/server technology is also gaining popularity these days.