This report presents a comprehensive literature review focusing on Deloitte's strategic information system. It begins by examining the current organizational structure of Deloitte Australia, detailing the roles and responsibilities of key figures such as the CEO and board of governors, and identifies potential operational problems within this structure. The review then explores the company's system acquisition methods, with a focus on the likely use of commercial accounting software and custom software solutions, including the Sharesight API. A system flowchart illustrates the sales procedures, highlighting key steps from order placement to shipment, and discusses potential control problems and recommended solutions. The report further delves into the development and adoption of accounting software packages, tracing their evolution, benefits, and challenges, particularly cloud-based solutions. It analyzes market demands, identifies leading software packages, and examines their competitive advantages, emphasizing the impact of automation and integration. The review concludes by discussing the increasing demand for these software packages and their role in maintaining a competitive edge in the accounting sector.