The book has been organized in two chapters: Design of Graphical User Interface (GUI) for NMAG and Design of modules for Magnetic Moment based Optimization in USPEX. Both chapters start with introduction and highlights. Then a detailed feasibility study is performed. Next section deals with design specifications, structured analysis, Data Flow Diagram, logical design, code development and at the end physical design together with different file formats. After this a special section is introduced to test the functionality of this newly designed code. Next section gives an overview of hardware and software requirements. A short section on future work is also provided after conclusion and benefits. At the end references are provided.