This study material provides an in-depth analysis of strategic information systems for business and enterprise. It covers system description, data flow diagrams, system flowcharts, internal control weaknesses, and associated risks. The content also includes a discussion on the purchases and cash disbursement systems, payroll system, and internal control weaknesses in each subsystem. The study material is suitable for students studying strategic information systems in business and enterprise. Course code: [Course Code], Course name: [Course Name], College/University: [College/University]