What are the business expansion of audit?

According to the International Standards for the Professional Practice of Internal Auditing, the main business of internal auditing includes confirmation business (risk and control self-assessment, compliance audit, financial audit, performance audit, business audit, privacy audit, due diligence audit, safety audit, quality audit, third-party audit and contract audit) and consulting business (internal control training, business process inspection, benchmarking management, information technology and system development). In other aspects, for example, the business of national audit and internal audit also includes term economic responsibility system audit and outgoing audit.

Books on auditing recommend Management and Information Technology, Implementing Internal Audit, Internal Control Self-evaluation Procedure and Sawyer Internal Audit.