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This report describes design of a database management system called MIDAS which stands for Management of Information for Design and Analysis of Systems. The system is designed to handle large matrix data of different types. A prototype system is first implemented. The system is re-designed to improve its efficiency. Capabilities of the system are described. It is evaluated in the engineering environment by solving systems of linear equations. The system is flexible; its buffer size, page size and number of pages can be changed. Variations of these parameters is studied and their effect on the system performance is evaluated. It is concluded that the application programs must be developed carefully to efficiently use a database management system. In addition, application programmer must be somewhat knowledgeable of the internal workings of the system.