Auditing is process of objectively examining , verifying and correcting the financial information and obtaining and evaluating evidence relate to the reliability and integrity of financial, occasional and operating information to the interested users. There are several types of audit that are categorized by the mandatory, concepts and nature and may one kind of audit may classified under many different catagory:

- External Audit

- Internal Audit

- Financial and Statutory audit.

- Compliance Audit.

  * Cost Recovery Audit

  * Joint Venture Audit

- Quality audit.

- Information system audit.