This book discusses a variety of issues related to the development and operations of the business applications in IT systems environment for reference by the auditors and business process practitioners. The development issues covered in this book include the traditional structured development approach, the relational database systems, and the application development in ERP systems environment. This book addresses the internal control and SOA requirements in IT systems environment for evaluation and reinforcement of the controls related to the financial and operational processes. This book includes an extensive coverage of the information and application processing requirements for most of the major business cycle processes including the revenue, purchasing, conversion, payroll, treasury and general accounting cycles. This book discusses the business cycle processes with reference to the implementation features from the major ERP systems incl. SAP R/3, JD Edwards and PeopleSoft Enterprise systems.