Executive Summary
With the proliferation of Internet, the information systems have become increasingly essential for the performance of the firms, since it could provide the conveniences and create one source of competitive advantages. The major objective of the report is to explore some accounting information systems related issues, in order to provide a clear and logic overview of accounting information system. To be more specific, first of all, the report will attempt to discuss four questions about SOX, sequential, non accounting services and physical control. After that, the report will analyze two case studies, and then discuss the relevant topics related to accounting information systems in detailed.

Content Introduction 1 The influences of SOX on provision of attest and advisory services 1 Background Information on SOX 2 Description of attest and advisory services 2 Influences of SOX on attest and advisory services 3 Comparison among sequential, block, group alphabetic and mnemonic codes 3 The rationality of non accounting services for external auditors 4 Prohibited non-audit services 4 Argument on prohibition 5 Six Classes of Physical Controls 5 Case of Bern Fly Rod Company 7 The previous situation 7 Potential internal control issues and exposures 7 Preventive measures for Bern Fly Rod Company 8 Case of Stand-Alone PC-Based Accounting System 9 Physical internal control weaknesses 9 IT Controls in PC-Based Accounting System 9 Conclusion 10 Reference 11

Introduction
It is necessary and essential for the firms to regard information system as one tool of conduct accounting, because the high efficiencies and conveniences can both be regarded as one source of competitive advantages for the performance of firms. There are two major parts in this report. For one thing, in the first part, the paper will explore four