This document discusses computer-assisted audit techniques (CAAT) and the use of Excel for CAAT. It defines CAAT and explains why they are used in auditing, noting benefits like handling large transaction volumes and providing an audit trail. The document outlines different CAAT techniques like auditing around and through computers. It also describes the capabilities of CAAT like importing various data formats and performing statistical analysis. Finally, the document provides examples of how CAAT and Excel can be used for auditing tasks like exception identification, control analysis, and error identification in areas like accounts payable, accounts receivable, and the general ledger.