ABSTRACT 

The study appraised the role of the internal auditor in a Computerized Accounting System case study of selected financial institutions. The specific objectives include to identify and evaluate Computer Aided Audit Techniques, to ascertain the relationship that exists between Computer Aided Audit Technique and .Audit functions in a Computerized Accounting System, to determine the perception of respondents on the audit techniques which facilitates the realization of the audit objectives, to identify factors that influence the computerization of Accounting System and to determine the constraints and challenges on the audit of computerized Accounting Systems and make recommendations accordingly. Purposive sampling technique was used to sample respondents upon which 51 respondents from the selected financial institutions were chosen thus well structure questionnaire served as a source of primary data and secondary data came from journals, textbooks, the World Wide Web etc. Therefore, data were analyzed using the Simple Descriptive Statistical tools which entail the use of means, percentages and tables. Regression and Correlation Analytical tools were likewise adopted to test the relationship between socioeconomic characteristics and computerization of Accounting and then the relationship between CAATS and Audit functions in the computerized Accounting System. The regression analysis revealed that socioeconomic factors have a significant relationship with the computerization of Accounting especially the age, educational attainment and training needs of respondents. The correlation analysis revealed that CAATs have a positive relationship with audit functions in a computerized Accounting System. The major problem of auditors a Computerized Accounting System is lack of computer prowess. This work contains recommendations for checking the plight.