If you work in an office setting where you are required to download or integrate financial data into a compatible worksheet you need to try MS or WKS - works spreadsheet. It is easy to use and it works great with MS Office and Microsoft Excel 2003. However, you may find that some programs did not support the WKS format. In this case, you can still open the WKS - Works spreadsheet file using Microsoft works. The only down size to using Microsoft works is the limited amount of features you will have to work with in the office suites. The Excel format can still support information contained in the WKS file. You need to determine which version Excel you are using and which version of Microsoft Office support your particular WKS format. When you work in an office setting and are required to create and enter financial information inside spreadsheets accuracy is the key to perfection.