In September, Google added the ability to export Google documents to the newer Microsoft Office formats that rely on open standards (.docx, .xlsx, .pptx). Google will focus resources on exporting to these newer open formats rather than the older, proprietary Office formats (.doc, .xls, .ppt) that were used in Office 97-2003.
As Google announced in October, after January 31, 2013
, users will not be able to export files to the older Office 97-2003 formats. For users who still use Office 97-2003, Google recommends installing the free compatibility plugin
from Microsoft, which will allow them to open the modern Office file types.For more information