Microsoft Excel is a proprietary commercial spreadsheet application written and distributed by Microsoft for Microsoft Windows and Mac OS X. It features calculation, graphing tools, pivot tables, and a macro programming language called Visual Basic for Applications. wikipedia.org

The general definition of an audit is a planned and documented activity performed by qualified personnel to determine by investigation, examination, or evaluation of objective evidence, the adequacy and compliance with established procedures, or applicable documents, and the effectiveness of implementation. wikipedia.org

QuickBooks is a line of business accounting software developed and marketed by Intuit. wikipedia.org

Xero is an online accounting software product for small and medium-sized businesses, as well as for personal finance. The product is sold by subscription (a distribution model commonly known as Software as a Service or SaaS) requiring the payment of a monthly fee. wikipedia.org

Bookkeeping is the recording of financial transactions. Transactions include sales, purchases, income, receipts and payments by an individual or organization. Bookkeeping is usually performed by a bookkeeper. wikipedia.org

Zoho CRM offers customer relationship management functionality, procurement, inventory, and some accounting functions from the realm of ERP. wikipedia.org

Data migration is the process of transferring data between computer storage types or file formats.

Quicken is a personal finance management tool developed by Intuit, Inc. wikipedia.org

Clear Books is an accounting a commercial web-based accounting software targeted for small businesses. It focuses on providing a simple, time-saving interface.