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Synopsis The formation and use of the traditional library card catalogue illustrate the operation of an informational system. The complexity of any data processing system prohibits analysis, evaluation, and design as a one step process. The book throws light on the evaluation of the efficiency economy, accuracy, productivity and timeliness of existing methods. The librarian familiar with the concepts and techniques of systems study should be able to increase the efficiency and productivity of the library. The tool of the preliminary survey is a methodical record of the present procedures being followed by a system. Preliminary survey worksheets are supplied for uniform approach and record in the surveying of all systems under review. Flow-chart symbols can be used to represent in a logical progression the elements, the requirements, the inputs/output of the system and the equipment used in the system. The evaluation phase culminates in a report of findings including recommendations for maintaining the library records, eliminating or transferring certain operations to another system. The continuous flow of informative with relevant examples makes this book and valuable asset for readers and professors alike. The author understands the mental horizons and capability of Indian students so he avoids technical words so that every reader could understand this book.