In addition to the dramatically different user interface and new file formats shared with other Microsoft Office 2007 programs, Microsoft Office Excel 2007 also adds a number of improvements and new features: Excel 2007 now supports up to 1 million rows and 16 thousand columns per worksheet! Specifically, the Office Excel 2007 grid is 1,048,576 rows by 16,384 columns, which give you 1,500% more rows, and 6,300% more columns than Excel 2003 to manage massive amounts of data! (FYI-columns now end at XFD instead of IV).