An information system collects, stores, processes, and reports data from various sources to provide managers with necessary information for decision making. Management information systems help establish organizational structure, document procedures, simplify audits, and maintain large financial databases. They are also used for accounting, generating financial reports, budgeting, planning, and decision making. Human resource management systems deal with activities like attendance tracking and payroll as well as maintaining employee data. Information systems allow effective marketing by collecting, sharing, and using information to promote brands through coordinated communication across departments.