Michael Croan, a senior marketing manager at , said, "Business customers can easily see that provides the productivity improvements they seek."

"Microsoft Office is well integrated, well supported and up-to-date with modern workforce requirements like collaboration, which is not always the case with open source alternatives. As a result, most customers will continue to seek the productivity improvements they can get from Office," Croan said.

Microsoft claims more than 550 million users of Microsoft Office.

OpenOffice.org's total usage, while unknown, . That is due to document compatibility fears and

OpenOffice.org 3.0 eases some adoption concerns. It is able to open all Office-formatted files, including the latest Office Open XML (OOXML) documents (.docx, .xlsx, .pptx, etc.), but it cannot save OOXML files natively.